Update fetch-query.md (#4296)

Summary:
Fix a bug where a variable had the wrong name

Pull Request resolved: #4296

Reviewed By: tyao1

Differential Revision: D45660859

Pulled By: captbaritone

fbshipit-source-id: bd09d5ab8130d18ab419bd3fbc5706dfb576606b

website/versioned_docs/version-v14.0.0/api-reference/relay-runtime/fetch-query.md

@@ -18,7 +18,7 @@ If you want to fetch a query outside of React, you can use the `fetchQuery` func
 
 ```js
 // You should prefer passing an environment that was returned from useRelayEnvironment()
-const MyEnvironment = require('MyEnvironment');
+const environment = require('MyEnvironment');
 const {fetchQuery} = require('react-relay');
 
 fetchQuery(