Update mfp-app playlist with latest content.

Author: github-actions[bot]

index.html

@@ -918,7 +918,7 @@
       </div>
 
       <h2>About</h2>
-      <h4>mfp; version: 1.2.1</h4>
+      <h4>mfp; version: 1.2.2</h4>
 
       <p>
         mfp; is a PWA remix of