Bump actions/cache from 4.0.2 to 4.1.2 (#440)

Bumps [actions/cache](https://github.com/actions/cache) from 4.0.2 to 4.1.2.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@0c45773...6849a64)

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

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

.github/workflows/elixir_test.yml

@@ -49,7 +49,7 @@ jobs:
 
       - name: Retrieve PLT Cache
 
-        uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9
+        uses: actions/cache@6849a6489940f00c2f30c0fb92c6274307ccb58a
         id: plt-cache
         with:
           path: priv/plts