Update test/unit/data-connect/data-connect-api-client-internal.spec.ts

Accepted a change suggestion(stylistic convention ).

Co-authored-by: Maneesh Tewani <[email protected]>

Author: ONATEMOWO

test/unit/data-connect/data-connect-api-client-internal.spec.ts

@@ -93,7 +93,7 @@ describe('DataConnectApiClient', () => {
   let app: FirebaseApp;
 
   let apiClient: DataConnectApiClient;
-  let apiClient_with_connector: DataConnectApiClient;
+  let apiClientWithConnector: DataConnectApiClient;
   let sandbox: sinon.SinonSandbox;
 
   beforeEach(() => {