chore(deps): update actions/cache action to v6 (#163)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/tests.yml

@@ -89,7 +89,7 @@ jobs:
       - name: Install Chrome for headless testing
         run: pnpm test:install-deps
       - name: Restore integration test cache
-        uses: actions/cache/restore@v5
+        uses: actions/cache/restore@v6
         with:
           path: examples/**/common/test/integration-test-cache.json
           key: integration-test-cache-${{ runner.os }}-${{ github.run_id }}-${{ github.run_attempt }}
@@ -103,7 +103,7 @@ jobs:
           done
           exit 1
       - name: Save integration test cache
-        uses: actions/cache/save@v5
+        uses: actions/cache/save@v6
         if: success()
         with:
           path: examples/**/common/test/integration-test-cache.json