tools: fix formatting of warning message in update-authors.js

The email already has `<` and `>` surrounding it so adding it results in
a misformatted message.

PR-URL: nodejs#40600
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Voltrex <mohammadkeyvanzade94@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

tools/update-authors.js

@@ -121,7 +121,7 @@ rl.on('line', (line) => {
   const duplicate = previousAuthors.get(author);
   if (duplicate && !duplicate.includes(email)) {
     console.warn('Author name already in AUTHORS file. Possible duplicate:');
-    console.warn(`  ${author} <${email}>`);
+    console.warn(`  ${author} ${email}`);
   }
 });