deploy guard: fix actions

.gitea/workflows/deploy.yml

@@ -63,6 +63,13 @@ jobs:
       - name: Build muffin
         run: nix build .#nixosConfigurations.muffin.config.system.build.toplevel -L
 
+      - name: Deploy guard preflight
+        run: |
+          ssh -i /run/agenix/ci-deploy-key \
+            -o StrictHostKeyChecking=yes \
+            -o UserKnownHostsFile=/etc/ci-known-hosts \
+            root@server-public deploy-guard-check
+
       - name: Deploy via deploy-rs
         run: |
           eval $(ssh-agent -s)