fix(deps): update dependency vuepress-plugin-search-pro to v2.0.0-rc.51

Author: renovate[bot]

package.json

@@ -37,7 +37,7 @@
     "vidstack": "1.11.21",
     "vue": "3.4.27",
     "vuepress": "2.0.0-rc.9",
-    "vuepress-plugin-search-pro": "2.0.0-rc.38",
+    "vuepress-plugin-search-pro": "2.0.0-rc.51",
     "vuepress-shared": "2.0.0-rc.38",
     "vuepress-theme-hope": "2.0.0-rc.38"
   },