chore(deps): update actions/cache action to v5

Author: renovate[bot]

.github/workflows/website.yaml

@@ -27,7 +27,7 @@ jobs:
           node-version: '24.10'
           cache: pnpm
           cache-dependency-path: pnpm-lock.yaml
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         id: playwright-cache
         with:
           path: ~/.cache/ms-playwright