chore(deps): update actions/cache action to v4 (#38)

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

.github/workflows/test.yml

@@ -95,7 +95,7 @@ jobs:
         run: echo "PLAYWRIGHT_VERSION=$(node -e "console.log(require('./package.json').devDependencies['@playwright/test'])")" >> $GITHUB_ENV
 
       - name: Cache Playwright binaries
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: playwright-cache
         with:
           path: |