Add Dash0 to tracing-overview.md (#4713)

This PR adds Dash0 to the list of supported OTEL observability tools.

Signed-off-by: Kasper Borg Nissen <[email protected]>
Co-authored-by: Mark Fussell <[email protected]>

Author: kaspernissen

daprdocs/content/en/operations/observability/tracing/tracing-overview.md

@@ -17,6 +17,7 @@ Most observability tools support OTEL, including:
 - [Zipkin](https://zipkin.io/)
 - [Jaeger](https://www.jaegertracing.io/)
 - [SignalFX](https://www.signalfx.com/)
+- [Dash0](https://www.dash0.com/)
 
 The following diagram demonstrates how Dapr (using OTEL and Zipkin protocols) integrates with multiple observability tools.