Build/Test Tools: Revert [57058].

Revert group name change in the 6.4 branch as the `functions.php` group was renamed `functions` after the branch was forked.

Props SergeyBiryukov.
See #59647, #58955.


Built from https://develop.svn.wordpress.org/branches/6.4@57059


git-svn-id: http://core.svn.wordpress.org/branches/6.4@56570 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.4-RC3-57058';
+$wp_version = '6.4-RC3-57059';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.