Bump actions/cache from 4 to 5 in the actions group

Bumps the actions group with 1 update: [actions/cache](https://github.com/actions/cache).


Updates `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](https://github.com/actions/cache/compare/v4...v5)

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

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

.github/workflows/ci.yml

@@ -96,7 +96,7 @@ jobs:
               cache: false
 
           - name: Cache Go build artifacts separately
-            uses: actions/cache@v4
+            uses: actions/cache@v5
             with:
               path: |
                 ~/.cache/go-build