chore: sign deploy commits

.gitea/workflows/build-and-push.yaml

@@ -68,8 +68,13 @@ jobs:
 
       - name: Commit changes
         run: |
+          echo "${{ secrets.SSH_PRIVATE_KEY }}" > ~/.ssh/id_ed25519
+          chmod 600 ~/.ssh/id_ed25519
           git config --local user.email "actions@noreply.dubyatp.xyz"
           git config --local user.name "actions[bot]"
+          git config --local user.signingkey ~/.ssh/id_ed25519
+          git config --local gpg.format ssh
+          git config --local commit.gpgsign true
           git commit -a -m "yt-dlp-bot: deploy update to ${{ needs.build-and-push.outputs.sha_short }}"
 
       - name: Push changes