Add shadow fix

Author: gbraadrh

.github/workflows/tailscale-deploy.yml

@@ -19,6 +19,7 @@ jobs:
               sleep 0.1
           done
           podman exec forgejo tailscale set --ssh=true
+          podman exec forgejo chmod 640 /etc/shadow
         env:
           TAILSCALE_AUTHKEY: ${{ secrets.TAILSCALE_AUTHKEY}}
       - name: Hang around