docs: fix React terminology (#20896)

Author: Naturalclar

docs/docs/sourcing-content-from-json-or-yaml.md

@@ -65,7 +65,7 @@ const YAMLbuildtime = () => (
 export default YAMLbuildtime
 ```
 
-The above code imports YAML source data as an array, iterates over it with the `Array.map` method, and renders the data-filled markup through a functional stateless React component.
+The above code imports YAML source data as an array, iterates over it with the `Array.map` method, and renders the data-filled markup through a functional React component.
 
 ## Directly import data with JSON