test: fix test-v8-collect-gc-profile-in-worker.js

PR-URL: https://github.com/nodejs/node/pull/46735
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

test/parallel/test-v8-collect-gc-profile-in-worker.js

@@ -4,7 +4,7 @@ require('../common');
 const { Worker } = require('worker_threads');
 const { testGCProfiler } = require('../common/v8');
 
-if (process.env.isWorker) {
+if (!process.env.isWorker) {
   process.env.isWorker = 1;
   new Worker(__filename);
 } else {