chore(deps): update dependency vitepress to v1.0.0-alpha.29

Author: renovate[bot]

package.json

@@ -138,7 +138,7 @@
     "typescript": "~4.8.4",
     "validator": "~13.7.0",
     "vite": "~3.2.3",
-    "vitepress": "1.0.0-alpha.28",
+    "vitepress": "1.0.0-alpha.29",
     "vitest": "~0.25.1",
     "vue": "~3.2.45"
   },