ci: see if going back to basics helps

.forgejo/workflows/deploy.yaml

@@ -38,7 +38,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       # setup deploy key
-      - uses: https://github.com/webfactory/ssh-agent@v0.9.0
-        with:
-          ssh-private-key: ${{ secrets.DEPLOY_KEY }}
+      - run: |
+          eval $(ssh-agent -s)
+          echo "${{ secrets.DEPLOY_KEY }}" | tr -d '\r' | ssh-add - > /dev/null
+          mkdir -p ~/.ssh
+          chmod 700 ~/.ssh
+          echo -e "Host *\n\tStrictHostKeyChecking no\n\n" > ~/.ssh/config
       - run: colmena apply -v --on @active-dns