Update main.yml

.github/workflows/main.yml

@@ -35,10 +35,12 @@ jobs:
            git config --local user.name "GitHub Action"
            git pull
            
-          
-      - name: typedocs generate Extensions API Reference (Node.js ${{ matrix.node-version }})
+      - name: Using Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
         with:
           node-version: ${{ matrix.node-version }}
+  
+      - name: typedocs generate Extensions API Reference (Node.js ${{ matrix.node-version }})
         run: | 
            yarn install
            yarn typedocs-extensions-api