ci(test): drop pip cache (Node 24 stack-overflow in setup-python cache restore)

Author: Seungpyo1007

.github/workflows/test.yml

@@ -19,7 +19,6 @@ jobs:
       - uses: actions/setup-python@v6
         with:
           python-version: "3.12"
-          cache: pip
 
       - name: Install dependencies
         run: pip install -e ".[dev]"