chore(deps): update dependency vitepress to v1.6.4

Author: renovate[bot]

package.json

@@ -12,7 +12,7 @@
   "author": "",
   "license": "ISC",
   "devDependencies": {
-    "vitepress": "1.0.0-alpha.32",
+    "vitepress": "1.6.4",
     "vue": "^3.2.45"
   },
   "pnpm": {