doc: Update document.

Author: jaywcjlove

README.md

@@ -12,7 +12,7 @@
   <p>
     <a target="_blank" href="https://apps.apple.com/app/devtutor/id6471227008" title="DevTutor for SwiftUI AppStore"><img alt="DevTutor for SwiftUI AppStore" src="https://tools.applemediaservices.com/api/badges/download-on-the-mac-app-store/black/en-us?size=250x83&amp;releaseDate=1705968000" height="51">
     </a>
-    <a target="_blank" href="https://apps.apple.com/app/devtutor/id6471227008?platform=iphone" title="DevTutor for SwiftUI AppStore"><img alt="DevTutor for SwiftUI AppStore" src="https://tools.applemediaservices.com/api/badges/download-on-the-app-store/black/en-us?size=250x83" height="51">
+    <a target="_blank" href="https://apps.apple.com/app/devtutor/id6471227008?platform=iphone" title="DevTutor for SwiftUI AppStore"><img alt="DevTutor for SwiftUI AppStore iOS" src="https://tools.applemediaservices.com/api/badges/download-on-the-app-store/black/en-us?size=250x83" height="51">
     </a>
   </p>
 </div>

README.zh.md

@@ -12,7 +12,7 @@
   <p>
     <a target="_blank" href="https://apps.apple.com/app/devtutor/id6471227008" title="DevTutor AppStore"><img alt="DevTutor AppStore" src="https://tools.applemediaservices.com/api/badges/download-on-the-mac-app-store/black/en-us?size=250x83&amp;releaseDate=1705968000" height="51">
     </a>
-    <a target="_blank" href="https://apps.apple.com/app/devtutor/id6471227008?platform=iphone" title="DevTutor for SwiftUI AppStore"><img alt="DevTutor for SwiftUI AppStore" src="https://tools.applemediaservices.com/api/badges/download-on-the-app-store/black/en-us?size=250x83" height="51">
+    <a target="_blank" href="https://apps.apple.com/app/devtutor/id6471227008?platform=iphone" title="DevTutor for SwiftUI AppStore"><img alt="DevTutor for SwiftUI AppStore iOS" src="https://tools.applemediaservices.com/api/badges/download-on-the-app-store/black/en-us?size=250x83" height="51">
     </a>
   </p>
 </div>