docs(components): remove emoji from warning in getting started guide

Author: shadow3aaa

docs/en/components/getting-started.md

@@ -19,7 +19,7 @@ cargo add tessera-ui-basic-components
 
 ## Registering with the renderer
 
-::: warning ⚠
+::: warning
 If you do not register the corresponding pipelines with the renderer, the renderer will crash.
 :::
 

docs/zhHans/components/getting-started.md

@@ -19,7 +19,7 @@ cargo add tessera-ui-basic-components
 
 ## 注册到渲染器
 
-::: warning ⚠
+::: warning
 如果不注册对应管线到渲染器中，渲染器将直接崩溃。
 :::