[FormData] 번역 - line189(#1232)

Author: kimdoyeom

5-network/02-formdata/article.md

@@ -185,4 +185,4 @@ Other methods are:
 - `formData.get(name)`
 - `formData.has(name)`
 
-That's it!
+다룰 내용은 여기까지입니다!