Update steps.json

Author: fengmk2

packages/cli/snap-tests/command-dev-with-port/steps.json

@@ -3,6 +3,6 @@
     "VITE_DISABLE_AUTO_INSTALL": "1"
   },
   "commands": [
-    "vite dev --port 12312312312 2>&1 | grep RangeError # dev server with wrong port throw error"
+    "vite dev --port 12312312312 2>&1 | grep RangeError # intentionally use an invalid port (exceeds 0-65535) to trigger RangeError"
   ]
 }