chore: update flatpak runtime to 25.08

Author: Totto16

.github/workflows/flatpak.yml

@@ -23,7 +23,7 @@ jobs:
       # Don't fail the whole workflow if one architecture fails
       fail-fast: false
     container:
-      image: ghcr.io/flathub-infra/flatpak-github-actions:freedesktop-24.08
+      image: ghcr.io/flathub-infra/flatpak-github-actions:freedesktop-25.08
       options: --privileged
     steps:
       - uses: actions/checkout@v4

io.github.openbrickprotocolfoundation.oopetris.yml

@@ -1,6 +1,6 @@
 app-id: io.github.openbrickprotocolfoundation.oopetris
 runtime: org.freedesktop.Platform
-runtime-version: '24.08'
+runtime-version: '25.08'
 sdk: org.freedesktop.Sdk
 command: oopetris
 modules: