Add api-version 2019-10-01 (#10249)

Author: ArcturusZhang

specification/resources/resource-manager/readme.go.md

@@ -34,6 +34,7 @@ batch:
   - tag: package-policy-2016-12
   - tag: package-policy-2016-04
   - tag: package-policy-2015-10
+  - tag: package-resources-2019-10
   - tag: package-resources-2019-05
   - tag: package-resources-2019-03
   - tag: package-resources-2018-05
@@ -186,6 +187,16 @@ namespace: policy
 output-folder: $(go-sdk-folder)/services/preview/resources/mgmt/2015-10-01-preview/policy
 ```
 
+### Tag: package-resources-2019-10 and go
+
+These settings apply only when `--tag=package-resources-2019-10 --go` is specified on the command line.
+Please also specify `--go-sdk-folder=<path to the root directory of your azure-sdk-for-go clone>`.
+
+``` yaml $(tag) == 'package-resources-2019-10' && $(go)
+namespace: resources
+output-folder: $(go-sdk-folder)/services/resources/mgmt/2019-10-01/resources
+```
+
 ### Tag: package-resources-2019-05 and go
 
 These settings apply only when `--tag=package-resources-2019-05 --go` is specified on the command line.