Config changes to reflect the default branch from master to main.

Author: luyajun0205

.openpublishing.publish.config.json

@@ -1,24 +1,5 @@
 {
   "build_entry_point": "docs",
-  "need_generate_pdf_url_template": true,
-  "need_generate_intellisense": false,
-  "need_preview_pull_request": true,
-  "git_repository_branch_open_to_public_contributors": "master",
-  "branch_target_mapping": {
-    "live": [
-      "Publish",
-      "Pdf"
-    ],
-    "master": [
-      "Publish",
-      "Pdf"
-    ]
-  },
-  "Targets": {
-    "Pdf": {
-      "template_folder": "_themes.pdf"
-    }
-  },  
   "docsets_to_publish": [
     {
       "docset_name": "IIS-Administration-e2e-prod",
@@ -36,19 +17,41 @@
     }
   ],
   "notification_subscribers": [],
+  "sync_notification_subscribers": null,
   "branches_to_filter": [],
+  "git_repository_branch_open_to_public_contributors": "main",
   "skip_source_output_uploading": false,
+  "need_preview_pull_request": true,
+  "contribution_branch_mappings": null,
   "dependent_repositories": [
     {
       "path_to_root": "_themes",
       "url": "https://github.com/Microsoft/templates.docs.msft",
-      "branch": "master",
+      "branch": "main",
       "branch_mapping": {}
     },
     {
       "path_to_root": "_themes.pdf",
       "url": "https://github.com/Microsoft/templates.docs.msft.pdf",
-      "branch": "master"
+      "branch": "main",
+      "branch_mapping": {}
+    }
+  ],
+  "branch_target_mapping": {
+    "live": [
+      "Publish",
+      "Pdf"
+    ],
+    "main": [
+      "Publish",
+      "Pdf"
+    ]
+  },
+  "need_generate_pdf_url_template": true,
+  "need_generate_intellisense": false,
+  "Targets": {
+    "Pdf": {
+      "template_folder": "_themes.pdf"
     }
-  ]
-}
+  }
+}