Update docblock examples to reflect new cleanup output messages

Co-authored-by: swissspidy <841956+swissspidy@users.noreply.github.com>

Author: Copilot

src/Core_Command.php

@@ -1123,7 +1123,7 @@ private static function get_core_checksums( $version, $locale, $insecure ) {
 	 *     Downloading update from https://downloads.wordpress.org/release/wordpress-4.5.2-no-content.zip...
 	 *     Unpacking the update...
 	 *     Cleaning up files...
-	 *     No files found that need cleaning up
+	 *     No old files were removed.
 	 *     Success: WordPress updated successfully.
 	 *
 	 *     # Update WordPress using zip file.
@@ -1138,6 +1138,8 @@ private static function get_core_checksums( $version, $locale, $insecure ) {
 	 *     Downloading update from https://wordpress.org/wordpress-3.1.zip...
 	 *     Unpacking the update...
 	 *     Cleaning up files...
+	 *     No old files were removed.
+	 *     Warning: Could not retrieve WordPress core checksums; skipping checksum-based cleanup. Files listed in $_old_files were still cleaned up.
 	 *     Success: WordPress updated successfully.
 	 *
 	 * @alias upgrade