ci: use openSUSE for OSC

Author: chyyran

.github/workflows/publish-obs.yml

@@ -10,15 +10,15 @@ jobs:
   publish-obs:
     if: github.repository == 'SnowflakePowered/librashader'
     runs-on: ubuntu-latest
-    container: fedora:42
+    container: opensuse/leap:15.6
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
       - name: Install OSC and dependencies
         env:
           OBS_CONFIG: ${{ secrets.OBS_CONFIG }}
         run: |
-          sudo dnf install -y osc obs-service-obs_scm obs-service-cargo cargo python3-zstandard
+          sudo zypper install --non-interactive osc obs-service-obs_scm obs-service-cargo cargo python-zstandard
           mkdir -p ~/.config/osc
           echo "$OBS_CONFIG" > ~/.config/osc/oscrc
       - name: Checkout Open Build Service repository