Mongo 4.2 Server version Support (Azure#18089)

Author: abhijitkaranjkar89

specification/cosmos-db/resource-manager/Microsoft.DocumentDB/stable/2021-10-15/cosmos-db.json

@@ -8503,7 +8503,8 @@
           "enum": [
             "3.2",
             "3.6",
-            "4.0"
+            "4.0",
+            "4.2"
           ],
           "description": "Describes the ServerVersion of an a MongoDB account.",
           "x-ms-enum": {