docs: fix URLs in README post-experimental move (#2600)

README.md

@@ -536,13 +536,13 @@ Apache 2.0 - See [LICENSE][license-url] for more information.
 [docs]: https://open-telemetry.github.io/opentelemetry-js
 [compliance-matrix]: https://github.com/open-telemetry/opentelemetry-specification/blob/main/spec-compliance-matrix.md
 
-[otel-metrics]: https://github.com/open-telemetry/opentelemetry-js/tree/main/packages/opentelemetry-sdk-metrics-base
+[otel-metrics]: https://github.com/open-telemetry/opentelemetry-js/tree/main/experimental/packages/opentelemetry-sdk-metrics-base
 [otel-node]: https://github.com/open-telemetry/opentelemetry-js/tree/main/packages/opentelemetry-sdk-trace-node
 
-[otel-instrumentation-fetch]: https://github.com/open-telemetry/opentelemetry-js/tree/main/packages/opentelemetry-instrumentation-fetch
-[otel-instrumentation-grpc]: https://github.com/open-telemetry/opentelemetry-js/tree/main/packages/opentelemetry-instrumentation-grpc
-[otel-instrumentation-http]: https://github.com/open-telemetry/opentelemetry-js/tree/main/packages/opentelemetry-instrumentation-http
-[otel-instrumentation-xml-http-request]: https://github.com/open-telemetry/opentelemetry-js/tree/main/packages/opentelemetry-instrumentation-xml-http-request
+[otel-instrumentation-fetch]: https://github.com/open-telemetry/opentelemetry-js/tree/main/experimental/packages/opentelemetry-instrumentation-fetch
+[otel-instrumentation-grpc]: https://github.com/open-telemetry/opentelemetry-js/tree/main/experimental/packages/opentelemetry-instrumentation-grpc
+[otel-instrumentation-http]: https://github.com/open-telemetry/opentelemetry-js/tree/main/experimental/packages/opentelemetry-instrumentation-http
+[otel-instrumentation-xml-http-request]: https://github.com/open-telemetry/opentelemetry-js/tree/main/experimental/packages/opentelemetry-instrumentation-xml-http-request
 
 [otel-shim-opentracing]: https://github.com/open-telemetry/opentelemetry-js/tree/main/packages/opentelemetry-shim-opentracing
 [otel-tracing]: https://github.com/open-telemetry/opentelemetry-js/tree/main/packages/opentelemetry-sdk-trace-base
@@ -551,16 +551,16 @@ Apache 2.0 - See [LICENSE][license-url] for more information.
 [otel-core]: https://github.com/open-telemetry/opentelemetry-js/tree/main/packages/opentelemetry-core
 [generate-api-documentation]: https://github.com/open-telemetry/opentelemetry-js/blob/main/CONTRIBUTING.md#generating-api-documentation
 
-[otel-contrib-instrumentation-dns]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/master/plugins/node/opentelemetry-instrumentation-dns
-[otel-contrib-instrumentation-ioredis]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/master/plugins/node/opentelemetry-instrumentation-ioredis
-[otel-contrib-instrumentation-mongodb]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/master/plugins/node/opentelemetry-instrumentation-mongodb
-[otel-contrib-instrumentation-mysql]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/master/plugins/node/opentelemetry-instrumentation-mysql
-[otel-contrib-instrumentation-pg]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/master/plugins/node/opentelemetry-instrumentation-pg
-[otel-contrib-instrumentation-redis]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/master/plugins/node/opentelemetry-instrumentation-redis
-[otel-contrib-instrumentation-express]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/master/plugins/node/opentelemetry-instrumentation-express
-[otel-contrib-instrumentation-user-interaction]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/master/plugins/web/opentelemetry-instrumentation-user-interaction
-[otel-contrib-instrumentation-document-load]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/master/plugins/web/opentelemetry-instrumentation-document-load
-[otel-contrib-instrumentation-hapi]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/master/plugins/node/opentelemetry-instrumentation-hapi
-[otel-contrib-instrumentation-koa]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/master/plugins/node/opentelemetry-instrumentation-koa
+[otel-contrib-instrumentation-dns]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/node/opentelemetry-instrumentation-dns
+[otel-contrib-instrumentation-ioredis]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/node/opentelemetry-instrumentation-ioredis
+[otel-contrib-instrumentation-mongodb]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/node/opentelemetry-instrumentation-mongodb
+[otel-contrib-instrumentation-mysql]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/node/opentelemetry-instrumentation-mysql
+[otel-contrib-instrumentation-pg]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/node/opentelemetry-instrumentation-pg
+[otel-contrib-instrumentation-redis]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/node/opentelemetry-instrumentation-redis
+[otel-contrib-instrumentation-express]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/node/opentelemetry-instrumentation-express
+[otel-contrib-instrumentation-user-interaction]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/web/opentelemetry-instrumentation-user-interaction
+[otel-contrib-instrumentation-document-load]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/web/opentelemetry-instrumentation-document-load
+[otel-contrib-instrumentation-hapi]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/node/opentelemetry-instrumentation-hapi
+[otel-contrib-instrumentation-koa]: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/main/plugins/node/opentelemetry-instrumentation-koa
 
 [spec-versioning]: https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/versioning-and-stability.md