fix publish-extension.yml

.github/workflows/publish-extension.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches:
       - main
+  workflow_dispatch:
 
 jobs:
   publish:
@@ -16,7 +17,7 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v2
         with:
-          node-version: '14'
+          node-version: '16'
 
       - name: Install vsce
         run: npm install -g vsce