use docker inspect instead of ps

Author: radofuchs

tests/e2e/features/steps/health.py

@@ -14,7 +14,7 @@ def llama_stack_connection_broken(context: Context) -> None:
 
     try:
         result = subprocess.run(
-            ["docker", "ps", "--filter", "name=llama-stack", "--format", "{{.Status}}"],
+            ["docker", "inspect", "-f", "{{.State.Running}}", "llama-stack"],
             capture_output=True,
             text=True,
             check=True,