Add redirect for MongoDB projection operators

Author: abinav2307

articles/cosmos-db/.openpublishing.redirection.cosmos-db.json

@@ -685,6 +685,11 @@
       "redirect_url": "/azure/cosmos-db/mongodb/vcore/operators/array-query/$elemmatch",
       "redirect_document_id": true
     },
+    {
+      "source_path_from_root": "/articles/cosmos-db/mongodb/vcore/operators/projection/$.md",
+      "redirect_url": "/azure/cosmos-db/mongodb/vcore/operators/array-update/$",
+      "redirect_document_id": true
+    },
     {
       "source_path_from_root": "/articles/cosmos-db/nosql/troubleshoot-dot-net-sdk-request-timeout.md",
       "redirect_url": "/azure/cosmos-db/nosql/troubleshoot-dotnet-sdk-request-timeout",