Enable pip cache for CI workflow

Author: hashhar

.github/workflows/ci.yml

@@ -26,6 +26,8 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: "3.11"
+          cache: "pip"
+          cache-dependency-path: setup.py
 
       - name: "Install pre-commit"
         run: pip install pre-commit
@@ -67,6 +69,8 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python }}
+          cache: "pip"
+          cache-dependency-path: setup.py
       - name: Install dependencies
         run: |
           sudo apt-get update