chore: docs for 0.2.11 release

exampleSite/content/posts/theme-documentation-content/index.en.md

@@ -245,6 +245,8 @@ This part is shown in the [emoji support page](../emoji-support/).
 
 ### Mathematical Formula
 
+{{< version 0.2.11 changed >}}
+
 **LoveIt** theme supports mathematical formulas based on [$\KaTeX$](https://katex.org/).
 
 Set the property `enable = true` under `[params.math]` in your [site configuration](../theme-documentation-basics#site-configuration)

exampleSite/content/posts/theme-documentation-content/index.zh-cn.md

@@ -244,6 +244,8 @@ resources:
 
 ### 数学公式
 
+{{< version 0.2.11 changed >}}
+
 **LoveIt** 基于 [$\KaTeX$](https://katex.org/) 提供数学公式的支持.
 
 在你的 [网站配置](../theme-documentation-basics#site-configuration) 中的 `[params.math]` 下面设置属性 `enable = true`,