fix: vue-pro主题样式优化 (#36)

Author: Dunizb

themes.js

@@ -66,8 +66,8 @@ export default {
     owner: 'dunizb',
     repo: 'juejin-markdown-theme-vue-pro',
     path: 'vue-pro.scss',
-    ref: '836e9bc',
-    highlight: 'juejin',
+    ref: '720e7a9',
+    highlight: 'monokai',
   },
   'healer-readable': {
     owner: 'healerLZH',