fix(blog): resolve typo in React 19 blog post (refs → refs) (#7828)

This PR corrects a small typo in the React documentation, changing "`refs`" to "`ref`s" for accuracy and consistency.

Author: amir78729

src/content/blog/2024/12/05/react-19.md

@@ -410,7 +410,7 @@ New function components will no longer need `forwardRef`, and we will be publish
 
 <Note>
 
-`refs` passed to classes are not passed as props since they reference the component instance.
+`ref`s passed to classes are not passed as props since they reference the component instance.
 
 </Note>