Update build-flatpak.yml

Author: smplayer-dev

.github/workflows/build-flatpak.yml

@@ -11,7 +11,7 @@ jobs:
       fail-fast: false
       matrix:
         config:
-          - { sdk: '5.15', image: 'wachii/fedora-flatpak-kde:5.15'}
+          - { sdk: '5.15', image: 'wachii/fedora-flatpak-kde:5.15-24-08'}
           - { sdk: '5.12', image: 'wachii/fedora-flatpak-kde:5.12' }
 
     runs-on: ubuntu-latest