Adding contract to open vcore mongo connection string blade (#1601)

* Adding a contract to open vcore mongo networking blade

* prettier fix

* Adding contract to open vcore mongo connection string blade

src/Contracts/ExplorerContracts.ts

@@ -40,6 +40,7 @@ export enum MessageTypes {
   OpenCosmosDBNetworkingBlade,
   DisplayNPSSurvey,
   OpenVCoreMongoNetworkingBlade,
+  OpenVCoreMongoConnectionStringsBlade,
 }
 
 export { ActionContracts, Diagnostics, Versions };