Merge pull request #3635 from test-repo-billy/jacktn/test-generate-net

change branch name

Author: JackTn

specificationRepositoryConfiguration.json

@@ -19,7 +19,7 @@
     "azure-sdk-for-net": {
       "integrationRepository": "azure-sdk/azure-sdk-for-net",
       "mainRepository": "Azure/azure-sdk-for-net",
-      "mainbranch": "jacktn/rewrite-generate-script",
+      "mainBranch": "jacktn/rewrite-generate-script",
       "configFilePath": "eng/swagger_to_sdk_config.json"
     },
     "azure-sdk-for-python": {