ci: bump actions/cache from 3 to 4

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](https://github.com/actions/cache/compare/v3...v4)

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

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/ci-main.yml

@@ -172,7 +172,7 @@ jobs:
         run: |
           docker-compose -f tests/e2e/docker-compose.yml up -d
       - id: cache-web
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: web/dist
           key: ${{ runner.os }}-web-${{ hashFiles('web/package-lock.json', 'web/src/**') }}