Bump actions/cache from 4.1.2 to 4.2.0 in the actions group (#599)

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


Updates `actions/cache` from 4.1.2 to 4.2.0
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@6849a64...1bd1e32)

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

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

.github/workflows/validate-release.yml

@@ -18,7 +18,7 @@ jobs:
           go-version: '1.23'
           check-latest: true
 
-      - uses: actions/cache@6849a6489940f00c2f30c0fb92c6274307ccb58a # v4.1.2
+      - uses: actions/cache@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4.2.0
         with:
           path: ~/go/pkg/mod
           key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}