Update actions/cache to v4.

Author: mijovic

.github/workflows/build.yml

@@ -71,7 +71,7 @@ jobs:
         with:
           node-version: '16'
       - uses: actions/checkout@v1
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: node_modules
           key: ${{ runner.os }}-${{ hashFiles('yarn.lock') }}