Help/About: Use the new /documentation/ URLs for HelpHub links in WordPress Admin.

As `https://wordpress.org/support/` was redirected to `https://wordpress.org/documentation/`, this changeset replaces various `/support/article/*` links with `/documentation/article/*` to avoid an extra redirect.

This also updates links to Support Forums by replacing `https://wordpress.org/support/` URLs with `https://wordpress.org/support/forums/`.

Props SergeyBiryukov, audrasjb, dhrupo, hasanmisbah, sakibmd, sabernhardt.
See #57726.


git-svn-id: https://develop.svn.wordpress.org/trunk@55412 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/setup-config.php

@@ -193,7 +193,7 @@ switch ( $step ) {
 		printf(
 			/* translators: 1: Documentation URL, 2: wp-config.php */
 			__( 'Need more help? <a href="%1$s">Read the support article on %2$s</a>.' ),
-			__( 'https://wordpress.org/support/article/editing-wp-config-php/' ),
+			__( 'https://wordpress.org/documentation/article/editing-wp-config-php/' ),
 			'<code>wp-config.php</code>'
 		);
 		?>
@@ -471,7 +471,7 @@ if ( ! /iPad|iPod|iPhone/.test( navigator.userAgent ) ) {
 						/* translators: 1: wp-config.php, 2: Documentation URL. */
 						__( 'You need to make the file %1$s writable before you can save your changes. See <a href="%2$s">Changing File Permissions</a> for more information.' ),
 						'<code>wp-config.php</code>',
-						__( 'https://wordpress.org/support/article/changing-file-permissions/' )
+						__( 'https://wordpress.org/documentation/article/changing-file-permissions/' )
 					);
 				} else {
 					$error_message = sprintf(