Update actions/cache action to v4

Author: renovate[bot]

.github/workflows/coverage.yml

@@ -17,7 +17,7 @@ jobs:
           node-version: 14.x
 
       - name: Cache npm dependencies
-        uses: actions/cache@v3.3.3
+        uses: actions/cache@v4.2.1
         with:
           path: '~/.npm'
           key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}