worker: fix typo in debug statement

PR-URL: https://github.com/nodejs/node/pull/42011
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Akhil Marsonya <akhil.marsonya27@gmail.com>
Reviewed-By: Mestery <mestery@protonmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

lib/internal/main/worker_thread.js

@@ -164,7 +164,7 @@ port.on('message', (message) => {
       process.stdin.push(null);
 
     debug(`[${threadId}] starts worker script ${filename} ` +
-          `(eval = ${eval}) at cwd = ${process.cwd()}`);
+          `(eval = ${doEval}) at cwd = ${process.cwd()}`);
     port.postMessage({ type: UP_AND_RUNNING });
     if (doEval === 'classic') {
       const { evalScript } = require('internal/process/execution');