Update docs/platforms/rust/common/configuration/options.mdx

Author: lcian

docs/platforms/rust/common/configuration/options.mdx

@@ -85,7 +85,7 @@ This option can be overridden using `in_app_include`.
 
 <SdkOption name="before_breadcrumb" type='Fn'>
 
-This function is called with a breadcrumb object before the breadcrumb is added to the scope. When `None` is returned from the function, the breadcrumb is dropped. To pass the breadcrumb through, return the first argument, which contains the breadcrumb object.
+This function is called with a breadcrumb object before the breadcrumb is added to the scope. When `None` is returned from the function, the breadcrumb is dropped. To pass the breadcrumb through, return the breadcrumb itself.
 
 </SdkOption>