💚 Add flathub repo

Author: trickypr

.github/workflows/alpha.yml

@@ -411,6 +411,7 @@ jobs:
      
       - name: Install build dependancies
         run: |
+          flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
           flatpak install flathub org.freedesktop.Platform//22.08 org.freedesktop.Sdk//22.08 org.mozilla.firefox.BaseApp//22.08 --assumeyes
   
       - name: Import GPG keys