Bump actions/cache from 5 to 6 in /.github/actions/test (#46)

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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Sudhanshu Vohra <sudhanshuvohra96@gmail.com>

Author: dependabot[bot]

.github/actions/test/action.yml

@@ -24,7 +24,7 @@ runs:
 
     - id: restore-spm-cache
       name: Restore SPM cache
-      uses: actions/cache@v5
+      uses: actions/cache@v6
       with:
         path: ~/Library/Developer/Xcode/DerivedData/**/SourcePackages
         key: spm-${{ inputs.platform }}-${{ hashFiles('*.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved') }}-${{ hashFiles('.xcode-version') }}-v1
@@ -36,7 +36,7 @@ runs:
 
     - id: restore-carthage-cache
       name: Restore Carthage cache
-      uses: actions/cache@v5
+      uses: actions/cache@v6
       with:
         path: Carthage
         key: carthage-${{ inputs.platform }}-${{ hashFiles('Cartfile.resolved') }}-${{ hashFiles('.xcode-version') }}-v1