Update specificationRepositoryConfiguration.json

Author: live1206

specificationRepositoryConfiguration.json

@@ -58,7 +58,7 @@
         },
         "azure-sdk-for-net": {
           "mainRepository": "openapi-env-test/azure-sdk-for-net",
-          "mainBranch": "live-test-track1",
+          "mainBranch": "live-test-track1"
         },
         "azure-sdk-for-python": {
           "mainRepository": "openapi-env-test/azure-sdk-for-python",