[mirotalksfu] - improve webhook, update dep

public/js/Brand.js

@@ -64,7 +64,7 @@ let BRAND = {
     },
     about: {
         imageUrl: '../images/mirotalk-logo.gif',
-        title: '<strong>WebRTC SFU v1.8.20</strong>',
+        title: '<strong>WebRTC SFU v1.8.21</strong>',
         html: `
             <button 
                 id="support-button"