fix: hljs 语言问题

components/prose/ProsePre.global.vue

@@ -91,9 +91,12 @@ const handleCopy = () => {
   })
 }
 const codeBlock = ref(null)
+const languages = hljs.listLanguages()
+const BASE_LANG = 'html'
 const handleRender = () => {
-  const language = props.language || 'html'
-  const lang = language.startsWith('vue') ? 'html' : language
+  const language = props.language || BASE_LANG
+  let lang = language.startsWith('vue') ? BASE_LANG : language
+  lang = languages.includes(lang) ? lang : BASE_LANG
   codeBlock.value = hljs.highlight(props.code, { language: lang }).value
 }
 watch(()=> props.code, () => {