Ensure we're using the correct @ignore phpDocumentor tag to mark elements that should be skipped when parsing.

Up to this point, various core elements' DocBlocks incorrectly included an `@internal` tag as a means for skipping the parsing process. When paired with a description (inline or otherwise), `@internal` is a valid tag meant to provide internal-only context, but not necessarily to skip parsing the entire element.

See #30987.


git-svn-id: https://develop.svn.wordpress.org/trunk@31170 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/admin.php

@@ -216,7 +216,7 @@ if ( isset($plugin_page) ) {
 		/**
 		 * Used to call the registered callback for a plugin screen.
 		 *
-		 * @internal
+		 * @ignore
 		 * @since 1.5.0
 		 */
 		do_action( $page_hook );