fix privateLink client name (#17808)

Author: tjegbejimba

specification/resources/resource-manager/Microsoft.Authorization/stable/2020-05-01/privateLinks.json

@@ -1,9 +1,9 @@
 {
   "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": [