chore(deps): update dependency vitepress to v1.6.4 (#20)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -12,7 +12,7 @@
   "license": "CC-BY-SA-4.0",
   "devDependencies": {
     "rimraf": "^6.0.0",
-    "vitepress": "1.0.0-rc.31",
+    "vitepress": "1.6.4",
     "vue": "^3.3.4"
   }
 }