Coding Standards: Remove a trailing comma from a `compact()` call in `_wp_customize_include()`.

This fixes a `Trailing comma's are not allowed in function calls in PHP 7.2 or earlier` error in the PHP compatibility check.

Follow-up to [52348].

See #53359.
Built from https://develop.svn.wordpress.org/trunk@52350


git-svn-id: http://core.svn.wordpress.org/trunk@51942 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/theme.php

@@ -3477,7 +3477,7 @@ function _wp_customize_include() {
 			'messenger_channel',
 			'settings_previewed',
 			'autosaved',
-			'branching',
+			'branching'
 		)
 	);
 }

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-beta2-52349';
+$wp_version = '5.9-beta2-52350';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.