Initialize Docs repository: https://github.com/MicrosoftDocs/cpp-docs-pr of branch main

Author: Khairunj

.openpublishing.publish.config.json

@@ -25,14 +25,11 @@
     }
   ],
   "notification_subscribers": [],
-  "sync_notification_subscribers": null,
+  "sync_notification_subscribers": [],
   "branches_to_filter": [],
   "git_repository_url_open_to_public_contributors": "https://github.com/MicrosoftDocs/cpp-docs",
   "git_repository_branch_open_to_public_contributors": "main",
-  "skip_source_output_uploading": false,
   "need_preview_pull_request": true,
-  "enable_incremental_build": true,
-  "contribution_branch_mappings": null,
   "dependent_repositories": [
     {
       "path_to_root": "_themes",
@@ -57,15 +54,16 @@
       "Pdf"
     ]
   },
-  "need_generate_pdf_url_template": true,
   "targets": {
     "Pdf": {
       "template_folder": "_themes.pdf"
     }
   },
+  "docs_build_engine": {},
+  "skip_source_output_uploading": false,
+  "enable_incremental_build": true,
+  "contribution_branch_mappings": null,
+  "need_generate_pdf_url_template": true,
   "need_generate_pdf": false,
-  "need_generate_intellisense": false,
-  "docs_build_engine": {
-    "name": "docfx_v3"
-  }
-}
+  "need_generate_intellisense": false
+}