Bump actions/cache from 4.1.1 to 4.2.0

Bumps [actions/cache](https://github.com/actions/cache) from 4.1.1 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@3624ceb...1bd1e32)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/env-checks.yml

@@ -59,7 +59,7 @@ jobs:
           fi;
 
       - name: Cache conda
-        uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8  # v4.1.1
+        uses: actions/cache@1bd1e32a3bdc45362d1e726936510720a7c30a57  # v4.2.0
         env:
           # Increase this value to reset cache if environment.yml has not changed
           CACHE_NUMBER: 0