Bump actions/cache from 4 to 5 (#58)

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] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/backend-tests.yml

@@ -35,7 +35,7 @@ jobs:
         shell: bash
         run: |
           echo "STORE_PATH=$(pnpm store path --silent)" >> $GITHUB_ENV
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         name: Setup pnpm cache
         with:
           path: ${{ env.STORE_PATH }}

.github/workflows/frontend-tests.yml

@@ -24,7 +24,7 @@ jobs:
         shell: bash
         run: |
           echo "STORE_PATH=$(pnpm store path --silent)" >> $GITHUB_ENV
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         name: Setup pnpm cache
         with:
           path: ${{ env.STORE_PATH }}