Fix doc and heatmap for the Vue3 refactoring (#21312)

docs/content/page/index.en-us.md

@@ -287,7 +287,7 @@ You can try it out using [the online demo](https://try.gitea.io/).
 - UI frameworks:
   - [jQuery](https://jquery.com)
   - [Fomantic UI](https://fomantic-ui.com)
-  - [Vue2](https://vuejs.org)
+  - [Vue3](https://vuejs.org)
   - and various components (see package.json)
 - Editors:
   - [CodeMirror](https://codemirror.net)

docs/content/page/index.fr-fr.md

@@ -258,7 +258,7 @@ Le but de ce projet est de fournir de la manière la plus simple, la plus rapide
 - Interface graphique :
   - [jQuery](https://jquery.com)
   - [Fomantic UI](https://fomantic-ui.com)
-  - [Vue2](https://vuejs.org)
+  - [Vue3](https://vuejs.org)
   - [CodeMirror](https://codemirror.net)
   - [EasyMDE](https://github.com/Ionaru/easy-markdown-editor)
   - [Monaco Editor](https://microsoft.github.io/monaco-editor)

docs/content/page/index.zh-cn.md

@@ -52,7 +52,7 @@ Gitea的首要目标是创建一个极易安装，运行非常快速，安装和
 - UI 框架：
   - [jQuery](https://jquery.com)
   - [Fomantic UI](https://fomantic-ui.com)
-  - [Vue2](https://vuejs.org)
+  - [Vue3](https://vuejs.org)
   - 更多组件参见 package.json
 - 编辑器：
   - [CodeMirror](https://codemirror.net)

docs/content/page/index.zh-tw.md

@@ -271,7 +271,7 @@ Gitea 是從 [Gogs](http://gogs.io) Fork 出來的，請閱讀部落格文章 [G
 - UI 元件：
   - [jQuery](https://jquery.com)
   - [Fomantic UI](https://fomantic-ui.com)
-  - [Vue2](https://vuejs.org)
+  - [Vue3](https://vuejs.org)
   - [CodeMirror](https://codemirror.net)
   - [EasyMDE](https://github.com/Ionaru/easy-markdown-editor)
   - [Monaco Editor](https://microsoft.github.io/monaco-editor)