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

Author: renovate[bot]

package.json

@@ -38,7 +38,7 @@
     "prettier": "3.0.3",
     "semantic-release": "21.1.1",
     "vite": "^4.2.1",
-    "vitepress": "1.0.0-alpha.33",
+    "vitepress": "1.6.4",
     "vitepress-plugin-search": "^1.0.4-alpha.17",
     "vue": "3.4.34"
   },