add azure-resource-manager-schema to servicelinker (#16176)

Co-authored-by: Nan Jiang <naji@microsoft.com>

Author: najian

specification/servicelinker/resource-manager/readme.md

@@ -66,6 +66,7 @@ swagger-to-sdk:
   - repo: azure-sdk-for-ruby
     after_scripts:
       - bundle install && rake arm:regen_all_profiles['azure_mgmt_servicelinker']
+  - repo: azure-resource-manager-schemas
 ```
 
 ## Go