upgrade github workflow to use v4

Author: mapoart

.github/workflows/nexss.yml

@@ -15,19 +15,19 @@ jobs:
         node-version: [14.x, 16.x]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
 
       - name: Install dependencies
         run: npm install
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         id: restore-build
         with:
           path: ./*