Use cache for pip in GitHub Action.

PR: USTC-KnowledgeComputingLab/qmb#68
Signed-off-by: Hao Zhang <[email protected]>

Author: hzhangxyz

.github/workflows/pre-commit.yml

@@ -14,6 +14,7 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: '3.12'
+          cache: 'pip'
 
       - name: Install dependencies
         run: pip install '.[dev]'