fix: install docker-cli on dind runner for image build

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/release.yml

@@ -40,7 +40,7 @@ jobs:
     steps:
       - name: Clone repository
         run: |
-          apk add --no-cache git curl jq
+          apk add --no-cache git curl jq docker-cli
           git clone https://${{ secrets.GITEA_TOKEN }}@gitea.jeanlucmakiola.de/${{ gitea.repository }}.git repo
           cd repo
           git checkout ${{ gitea.ref_name }}