build(deps): bump actions/cache in /.github/actions/setup-darwin

Bumps [actions/cache](https://github.com/actions/cache) from 5 to 6.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v5...v6)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/actions/setup-darwin/action.yml

@@ -65,7 +65,7 @@ runs:
 
     - id: restore-pods-cache
       name: Restore Pods cache
-      uses: actions/cache@v5
+      uses: actions/cache@v6
       with:
         path: auth0_flutter/example/${{ steps.lowercase-platform.outputs.platform }}/Pods
         key: pods-${{ hashFiles('Podfile.lock') }}-${{ hashFiles('.xcode-version') }}-v1