Enable pip caching in publish-pypi workflow

Added pip caching to the Python setup step.

Author: yztxwd

.github/workflows/publish-pypi.yml

@@ -16,6 +16,7 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: "3.11"
+          cache: 'pip'
 
       - name: Install build tools
         run: python -m pip install --upgrade pip build twine