fix(deps): update dependency @vuepress/plugin-shiki to v2.0.0-rc.121

Author: renovate[bot]

package.json

@@ -13,7 +13,7 @@
   "dependencies": {
     "@vuepress/bundler-vite": "2.0.0-rc.9",
     "@vuepress/plugin-search": "2.0.0-rc.21",
-    "@vuepress/plugin-shiki": "2.0.0-rc.21",
+    "@vuepress/plugin-shiki": "2.0.0-rc.121",
     "vue": "3.4.21",
     "vuepress": "2.0.0-rc.9",
     "vuepress-theme-hope": "2.0.0-rc.32"