chore(deps): bump actions/cache from 3 to 4 (#39)

Bumps [actions/cache](https://github.com/actions/cache) from 3 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v3...v4)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci-docker.yml

@@ -18,7 +18,7 @@ jobs:
         uses: docker/setup-qemu-action@v1
       - id: buildx
         uses: docker/setup-buildx-action@v1
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-${{ runner.arch }}-buildx-${{ github.sha }}
@@ -48,7 +48,7 @@ jobs:
         uses: docker/setup-qemu-action@v1
       - id: buildx
         uses: docker/setup-buildx-action@v1
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-${{ runner.arch }}-buildx-${{ github.sha }}