fix bug

docs/dynamic/cover.md

@@ -25,7 +25,7 @@ config-methods(cover: (self: none, body) => hide(body))
 You will find that the existing cover function cannot hide the mark of enum and list, refer to [here](https://github.com/touying-typ/touying/issues/10), so you can hack:
 
 ```typst
-#let s = (s.methods.update-cover)(self: s, body => box(scale(x: 0%, body)))
+config-methods(cover: (self: none, body) => box(scale(x: 0%, body)))
 ```
 
 ## Semi-Transparent Cover Function

i18n/zh/docusaurus-plugin-content-docs/current/dynamic/cover.md

@@ -30,7 +30,7 @@ config-methods(cover: (self: none, body) => hide(body))
 你会发现现有的 cover 函数无法隐藏 enum 和 list 的 mark，参考 [这里](https://github.com/touying-typ/touying/issues/10)，因此你可以进行 hack：
 
 ```typst
-#let s = (s.methods.update-cover)(self: s, body => box(scale(x: 0%, body)))
+config-methods(cover: (self: none, body) => box(scale(x: 0%, body)))
 ```
 
 

i18n/zh/docusaurus-plugin-content-docs/version-0.5.x/dynamic/cover.md

@@ -30,7 +30,7 @@ config-methods(cover: (self: none, body) => hide(body))
 你会发现现有的 cover 函数无法隐藏 enum 和 list 的 mark，参考 [这里](https://github.com/touying-typ/touying/issues/10)，因此你可以进行 hack：
 
 ```typst
-#let s = (s.methods.update-cover)(self: s, body => box(scale(x: 0%, body)))
+config-methods(cover: (self: none, body) => box(scale(x: 0%, body)))
 ```
 
 

versioned_docs/version-0.5.x/dynamic/cover.md

@@ -25,7 +25,7 @@ config-methods(cover: (self: none, body) => hide(body))
 You will find that the existing cover function cannot hide the mark of enum and list, refer to [here](https://github.com/touying-typ/touying/issues/10), so you can hack:
 
 ```typst
-#let s = (s.methods.update-cover)(self: s, body => box(scale(x: 0%, body)))
+config-methods(cover: (self: none, body) => box(scale(x: 0%, body)))
 ```
 
 ## Semi-Transparent Cover Function