Merge pull request #4 from frequenz-floss/dependabot/github_actions/actions/cache-4

Bump actions/cache from 3 to 4

Author: tiyash-basu-frequenz

.github/workflows/ci.yaml

@@ -143,7 +143,7 @@ jobs:
       # https://github.com/docker/build-push-action/issues/252
       # https://github.com/moby/buildkit/issues/1896
       - name: Cache container layers
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-nox-${{ matrix.arch }}-${{ matrix.os }}-${{ matrix.python }}
@@ -168,7 +168,7 @@ jobs:
 
       # Cache pip downloads
       - name: Cache pip downloads
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: /tmp/pip-cache
           key: nox-${{ matrix.nox-session }}-${{ matrix.arch }}-${{ matrix.os }}-${{ matrix.python }}-${{ hashFiles('pyproject.toml') }}