Update actions/cache action to v4

Author: renovate[bot]

.github/workflows/ci-cd.yml

@@ -18,7 +18,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
       - name: Cache Python modules
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-${{ hashFiles('**/poetry.lock') }}
@@ -54,7 +54,7 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: "3.11"
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         name: Configure pip caching
         with:
           path: ~/.cache/pip
@@ -86,7 +86,7 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: "3.11"
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         name: Configure pip caching
         with:
           path: ~/.cache/pip