Installer workflow: Create ISO instead of build artifact

.gitea/workflows/installer.yaml

@@ -25,10 +25,13 @@ jobs:
             login --set-default colony https://nix-cache.nul.ie "${{ secrets.NIX_CACHE_TOKEN }}"
 
       - name: Build installer ISO
+        id: build
         run: |
+          echo "short_rev=$(git rev-parse --short HEAD)" >> "$GITHUB_OUTPUT"
           nix build .#nixosConfigurations.installer.config.my.buildAs.iso
-      - name: Upload ISO
+      - name: Create release for ISO
-        uses: actions/upload-artifact@v3
+        uses: https://gitea.com/actions/release-action@main
         with:
-          name: installer-iso
+          title: Installer @ `${{ steps.build.outputs.short_rev }}`
-          path: result/iso/nixos-installer-devplayer0.iso
+          files: |
+            result/iso/nixos-installer-devplayer0.iso