chore: use ssh private key in ci

.gitea/workflows/benchmark.yaml

@@ -51,6 +51,12 @@ jobs:
       - name: 🏃 Execute Runtime
         run: pnpm run --filter @nodarium/app bench
 
+      - name: 🔑 Setup SSH key
+        run: |
+          mkdir -p ~/.ssh
+          echo "${{ secrets.GIT_SSH_PRIVATE_KEY }}" > ~/.ssh/id_ed25519
+          chmod 600 ~/.ssh/id_ed25519
+          ssh-keyscan -H git.max-richter.dev >> ~/.ssh/known_hosts
 
       - name: 📤 Push Results
         env: