fix(readme): Fixes badge icon and f-droid link.

Fixes #15464
Fixes #15465

README.md

 
 | Android | Android (F-Droid) | iOS |
 |:-:|:-:|:-:|
-| [<img src="resources/img/google-play-badge.png" height="50">](https://play.google.com/store/apps/details?id=org.jitsi.meet) | [<img src="resources/img/f-droid-badge.png" height="50">](https://f-droid.org/en/packages/org.jitsi.meet/) | [<img src="resources/img/appstore-badge.png" height="50">](https://itunes.apple.com/us/app/jitsi-meet/id1165103905) |
+| [<img src="resources/img/google-play-badge.png" height="50">](https://play.google.com/store/apps/details?id=org.jitsi.meet) | [<img src="resources/img/f-droid-badge.png" height="50">](https://f-droid.org/packages/org.jitsi.meet/) | [<img src="resources/img/appstore-badge.png" height="50">](https://itunes.apple.com/us/app/jitsi-meet/id1165103905) |
 
 If you are feeling adventurous and want to get an early scoop of the features as they are being
 developed you can also sign up for our open beta testing here:

interface_config.js

     /**
      * Specify custom URL for downloading f droid app.
      */
-    // MOBILE_DOWNLOAD_LINK_F_DROID: 'https://f-droid.org/en/packages/org.jitsi.meet/',
+    // MOBILE_DOWNLOAD_LINK_F_DROID: 'https://f-droid.org/packages/org.jitsi.meet/',
 
     // Connection indicators (
     // CONNECTION_INDICATOR_AUTO_HIDE_ENABLED,

react/features/base/config/functions.web.ts

     android.downloadLink = android.downloadLink
         || 'https://play.google.com/store/apps/details?id=org.jitsi.meet';
     android.appPackage = android.appPackage || 'org.jitsi.meet';
-    android.fDroidUrl = android.fDroidUrl || 'https://f-droid.org/en/packages/org.jitsi.meet/';
+    android.fDroidUrl = android.fDroidUrl || 'https://f-droid.org/packages/org.jitsi.meet/';
     if (android.dynamicLink) {
         android.dynamicLink.apn = android.dynamicLink.apn || 'org.jitsi.meet';
         android.dynamicLink.appCode = android.dynamicLink.appCode || 'w2atb';