message: fix privateLink client name
diff: {
  "swagger": "2.0",
  "info": {
  - "title": "PolicyClient",
  + "title": "ResourcePrivateLinkClient",
  "version": "2020-05-01",
  - "description": "To manage and control access to your resources, you can define customized policies and assign them at a scope."
  + "description": "Provides operations for managing private link resources"
  },
  "host": "management.azure.com",
  "schemes": [
  