Docs: Add and correct examples of common names for various dynamic hooks.

See #53581

Built from https://develop.svn.wordpress.org/trunk@51327


git-svn-id: http://core.svn.wordpress.org/trunk@50936 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/admin.php

@@ -320,6 +320,16 @@ if ( isset( $plugin_page ) ) {
 	 *
 	 * The dynamic portion of the hook name, `$importer`, refers to the importer slug.
 	 *
+	 * Possible hook names include:
+	 *
+	 *  - `load-importer-blogger`
+	 *  - `load-importer-wpcat2tag`
+	 *  - `load-importer-livejournal`
+	 *  - `load-importer-mt`
+	 *  - `load-importer-rss`
+	 *  - `load-importer-tumblr`
+	 *  - `load-importer-wordpress`
+	 *
 	 * @since 3.5.0
 	 */
 	do_action( "load-importer-{$importer}" ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores