Fix setting node version in gh workflow

.github/workflows/main.yml

@@ -16,7 +16,7 @@ jobs:
         go-version: ${{ matrix.go-version }}
     - name: Install Nodejs
       uses: actions/setup-node@v1
-      with: 
+      with:
         node-version: '10.x'
     - name: Install circom
       run: npm install -g circom