Bump actions/cache from 4 to 5 (#438)

Bumps [actions/cache](https://github.com/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](actions/cache@v4...v5)

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

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

Author: dependabot[bot]

.github/workflows/caching-envs-example.yml

@@ -49,7 +49,7 @@ jobs:
         shell: bash
 
       - name: Cache Conda env
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ${{ env.CONDA }}/envs
           key:

.github/workflows/caching-example.yml

@@ -30,7 +30,7 @@ jobs:
     steps:
       - uses: actions/[email protected]
       - name: Cache conda
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         env:
           # Increase this value to reset cache if etc/example-environment.yml has not changed
           CACHE_NUMBER: 2
@@ -58,7 +58,7 @@ jobs:
     steps:
       - uses: actions/[email protected]
       - name: Cache conda
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         env:
           # Increase this value to reset cache if etc/example-environment.yml has not changed
           CACHE_NUMBER: 2