ci: allow prerelease

.gitea/workflows/cd.yaml

@@ -11,6 +11,7 @@ on:
       - tsconfig.json
       - Dockerfile
       - bun.lockb
+  workflow_dispatch:
 
 env:
   DOCKER_REGISTRY: gitea.t000-n.de
@@ -92,7 +93,7 @@ jobs:
         id: tag
         with:
           token: ${{ secrets.GITEA_TOKEN }}
-          prerelease: false
+          prerelease: ${{ github.event_name == 'workflow_dispatch' }}
       - uses: https://gitea.t000-n.de/t.behrendt/actions/release-git-tag@0.0.2
         with:
           tag: ${{ steps.tag.outputs.new-tag }}