test: change Fixes: to Refs:

Tests don't fix things generally, so use "Refs:" to refer people to
GitHub issues.

PR-URL: #34568
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: Trott

test/parallel/test-http-outgoing-message-inheritance.js

@@ -6,8 +6,8 @@ const { Writable } = require('stream');
 const assert = require('assert');
 
 // Check that OutgoingMessage can be used without a proper Socket
-// Fixes: https://github.com/nodejs/node/issues/14386
-// Fixes: https://github.com/nodejs/node/issues/14381
+// Refs: https://github.com/nodejs/node/issues/14386
+// Refs: https://github.com/nodejs/node/issues/14381
 
 class Response extends OutgoingMessage {
   _implicitHeader() {}

test/parallel/test-http-server-response-standalone.js

@@ -6,8 +6,8 @@ const { Writable } = require('stream');
 const assert = require('assert');
 
 // Check that ServerResponse can be used without a proper Socket
-// Fixes: https://github.com/nodejs/node/issues/14386
-// Fixes: https://github.com/nodejs/node/issues/14381
+// Refs: https://github.com/nodejs/node/issues/14386
+// Refs: https://github.com/nodejs/node/issues/14381
 
 const res = new ServerResponse({
   method: 'GET',