Bump actions/cache from 4 to 5 (#283559)

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](https://github.com/actions/cache/compare/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] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/copilot-setup-steps.yml

@@ -55,7 +55,7 @@ jobs:
 
       - name: Restore node_modules cache
         id: cache-node-modules
-        uses: actions/cache/restore@v4
+        uses: actions/cache/restore@v5
         with:
           path: .build/node_modules_cache
           key: "node_modules-linux-${{ hashFiles('.build/packagelockhash') }}"
@@ -119,7 +119,7 @@ jobs:
 
       - name: Restore built-in extensions cache
         id: cache-builtin-extensions
-        uses: actions/cache/restore@v4
+        uses: actions/cache/restore@v5
         with:
           enableCrossOsArchive: true
           path: .build/builtInExtensions