bump node version to 19

Author: zouyee

.github/workflows/main.yml

@@ -17,7 +17,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v3
         with:
-          node-version: 16
+          node-version: 19
 
       - name: Check links
         run: npx markdown-link-check -c .markdown-link-check-config.json README.md