Bump actions/cache from 3 to 4 (#6572)

Bumps [actions/cache](https://github.com/actions/cache) from 3 to 4.
- [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/v3...v4)

---
updated-dependencies:
- dependency-name: actions/cache
  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/frontend-admin-tests.yml

@@ -50,7 +50,7 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-pnpm-store-
       - name: Cache playwright binaries
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: playwright-cache
         with:
           path: |

.github/workflows/frontend-tests.yml

@@ -57,7 +57,7 @@ jobs:
         name: Create settings.json
         run: cp ./src/tests/settings.json settings.json
       - name: Cache playwright binaries
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: playwright-cache
         with:
           path: |
@@ -127,7 +127,7 @@ jobs:
       - name: Create settings.json
         run: cp ./src/tests/settings.json settings.json
       - name: Cache playwright binaries
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: playwright-cache
         with:
           path: |
@@ -175,7 +175,7 @@ jobs:
         with:
           node-version: 22
       - name: Cache playwright binaries
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: playwright-cache
         with:
           path: |