lib: fix typo in comment

Small update in a realm.js documentation comment to correct `js2c.py`
which was ported to `js2c.cc` and removed.

PR-URL: nodejs#53543
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Paolo Insogna <paolo@cowtech.it>
Reviewed-By: Ethan Arrowood <ethan@arrowood.dev>

lib/internal/bootstrap/realm.js

@@ -31,7 +31,7 @@
 // Internal JavaScript module loader:
 // - BuiltinModule: a minimal module system used to load the JavaScript core
 //   modules found in lib/**/*.js and deps/**/*.js. All core modules are
-//   compiled into the node binary via node_javascript.cc generated by js2c.py,
+//   compiled into the node binary via node_javascript.cc generated by js2c.cc,
 //   so they can be loaded faster without the cost of I/O. This class makes the
 //   lib/internal/*, deps/internal/* modules and internalBinding() available by
 //   default to core modules, and lets the core modules require itself via