ci: use actions/setup-node@v2 (webpack#969)

Author: snitin315

.github/workflows/nodejs.yml

@@ -30,7 +30,7 @@ jobs:
           fetch-depth: 0
 
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
 
@@ -64,7 +64,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}