docs: 앱스토어 링크로 수정

Author: opficdev

README.md

@@ -32,11 +32,11 @@
 
 ## 앱 사용해보기
 
-iOS 17 이상 환경에서 TestFlight 베타 테스트 가능
+iOS 17 이상 환경에서 App Store에서 다운로드 가능
+
+<a href="https://apps.apple.com/us/app/devlog/id6760288611">
+  <img src="https://img.shields.io/badge/App%20Store-0D96F6?style=flat&logo=appstore&logoColor=white" />
 
-<a href="https://testflight.apple.com/join/b8mpr4UN">
-  <img src="https://img.shields.io/badge/TestFlight-0D96F6?style=flat&logo=data:image/svg%2Bxml;base64,PHN2ZyB4bWxucz0naHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmcnIHZpZXdCb3g9JzAgMCAyNCAyNCc%2BPGcgZmlsbD0nI2ZmZicgdHJhbnNmb3JtPSd0cmFuc2xhdGUoMTIgMTIpJz48ZWxsaXBzZSBjeD0nMCcgY3k9Jy02JyByeD0nMy4yJyByeT0nNS40Jy8%2BPGVsbGlwc2UgY3g9JzAnIGN5PSctNicgcng9JzMuMicgcnk9JzUuNCcgdHJhbnNmb3JtPSdyb3RhdGUoMTIwKScvPjxlbGxpcHNlIGN4PScwJyBjeT0nLTYnIHJ4PSczLjInIHJ5PSc1LjQnIHRyYW5zZm9ybT0ncm90YXRlKDI0MCknLz48Y2lyY2xlIHI9JzInLz48L2c%2BPC9zdmc%2B" />
-</a>
 
 ## 프로젝트 개요