Bump actions/cache from 4.0.2 to 4.2.0

Bumps [actions/cache](https://github.com/actions/cache) from 4.0.2 to 4.2.0.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](0c45773b62...1bd1e32a3b)

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

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

.github/workflows/unit_tests.yaml

@@ -10,7 +10,7 @@ jobs:
       uses: actions/setup-go@0a12ed9d6a96ab950c8f026ed9f722fe0da7ef32
       with:
         go-version: 1.19
-    - uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9
+    - uses: actions/cache@1bd1e32a3bdc45362d1e726936510720a7c30a57
       with:
         path: |
           ~/go/pkg/mod