doc: add missing word in modules.md

PR-URL: #18343
Reviewed-By: Gireesh Punathil <[email protected]>
Reviewed-By: Vse Mozhet Byt <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

Author: metapragma

doc/api/modules.md

@@ -468,7 +468,7 @@ added: v0.1.27
 
 * {string}
 
-The directory name of the current module. This the same as the
+The directory name of the current module. This is the same as the
 [`path.dirname()`][] of the [`__filename`][].
 
 Example: running `node example.js` from `/Users/mjr`