Update actions/cache action to v4

Author: renovate[bot]

.github/workflows/ci-cd.yml

@@ -14,7 +14,7 @@ jobs:
         with:
           python-version: '3.10'
       - name: Cache Python modules
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-${{ hashFiles('**/Pipfile.lock') }}