better sanity check

Author: lionello

.github/workflows/install.yml

@@ -18,5 +18,5 @@ jobs:
       - name: Install defang
         run: . <(curl -Ls https://s.defang.io/install)
 
-      - name: Login to Defang
-        run: defang version
+      - name: Sanity check
+        run: defang --version