chore(deps): update dependency @shikijs/vitepress-twoslash to v2 (#19… (#1824)

resolve #1823

vitejs/vite@92e7b81 の反映です。

Author: shuuji3

package.json

@@ -9,7 +9,7 @@
     "lint": "textlint --format pretty-error **/*.md"
   },
   "devDependencies": {
-    "@shikijs/vitepress-twoslash": "^1.26.2",
+    "@shikijs/vitepress-twoslash": "^2.1.0",
     "@type-challenges/utils": "^0.1.1",
     "@types/express": "^4.17.21",
     "@types/node": "^22.10.6",
@@ -21,7 +21,7 @@
     "textlint-filter-rule-comments": "^1.2.2",
     "textlint-rule-preset-vuejs-jp": "git+https://github.com/vuejs-jp/textlint-rule-preset-vuejs-jp.git",
     "vite": "^6.0.11",
-    "vitepress": "1.5.0",
+    "vitepress": "1.6.3",
     "vitepress-plugin-group-icons": "^1.3.4",
     "vue": "^3.5.13",
     "yorkie": "^2.0.0"