Coding Standards: Rename the $cat_ID variable to $cat_id in wp_update_category().

This resolves a few WPCS warnings:
{{{
Variable "$cat_ID" is not in valid snake_case format, try "$cat_i_d"
}}}

Follow-up to [2695], [4490], [52958].

Props hilayt24, viralsampat, desrosj, robinwpdeveloper, tanazmasaba, costdev, SergeyBiryukov.
See #56754.
Built from https://develop.svn.wordpress.org/trunk@55190


git-svn-id: http://core.svn.wordpress.org/trunk@54723 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.2-alpha-55189';
+$wp_version = '6.2-alpha-55190';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.