Update mfp-app playlist with latest content.

Author: github-actions[bot]

index.html

@@ -973,7 +973,7 @@
       </div>
 
       <h2>About</h2>
-      <h4>mfp; version: 1.2.5</h4>
+      <h4>mfp; version: 1.2.6</h4>
 
       <p>
         mfp; is a PWA remix of