chore(deps): bump vitepress to solve build issue.

Author: tangmengyu.amber

package.json

@@ -10,7 +10,7 @@
 		"chalk": "^4.1.0",
 		"gray-matter": "^4.0.3",
 		"lodash": "^4.17.21",
-		"vitepress": "^0.19.2",
+		"vitepress": "^0.21.6",
 		"yorkie": "^2.0.0"
 	},
 	"scripts": {