chore(deps): Bump actions/cache from 4 to 5 (#61)

Bumps [actions/cache](https://github.com/actions/cache) from 4 to 5.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v4...v5)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -57,7 +57,7 @@ jobs:
           cache-dependency-path: requirements-typing.txt
           check-latest: true
       - name: mypy cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: .mypy_cache
           key: "${{ runner.os }}-mypy-3.13-${{ hashFiles('requirements-typing.txt') }}"