Update README.md

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: Turtle-Hwan

README.md

@@ -25,7 +25,7 @@
 - **[언제볼까 :: 빠른 모임 날짜 약속]** [링크](https://when-will-we-meet.com/)
   - Web 제공
 - **[쿠맵 :: 건국대학교 배리어프리 지도]** [링크](https://github.com/KU-Barrier-Free/)
-  - Android, IOS 앱 제공
+  - Android, iOS 앱 제공
 
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