Update children.mdx (#3418)

correct typo

Author: fdvmoreira

website/versioned_docs/version-0.20/concepts/function-components/children.mdx

@@ -2,7 +2,7 @@
 title: 'Children'
 ---
 
-`Children` is a special prop type that allows you to recieve nested `Html` that is provided like html child elements.
+`Children` is a special prop type that allows you to receive nested `Html` that is provided like html child elements.
 
 ```rust
 use yew::{function_component, html, Html, Properties, Children};