Fixing nits

Signed-off-by: Vladimir Suvorov <[email protected]>

Author: mydatascience

src/MaxText/examples/grpo_llama3_demo.ipynb

@@ -97,8 +97,8 @@
    "source": [
     "# Configuration for GRPO training\n",
     "import os\n",
-    "from re import M\n",
     "import MaxText\n",
+    "from huggingface_hub import login\n",
     "\n",
     "# Set up paths (adjust if needed)\n",
     "MAXTEXT_REPO_ROOT = os.path.dirname(MaxText.__file__)\n",