Update actions/cache action to v4 (#6)

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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
         with:
           node-version: ${{ matrix.node-version }}
       - name: Restore cached dependencies
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.pnpm-store
           key: node-modules-${{ hashFiles('package.json') }}