docs: added ios-team-release if iOS app

Author: ethanneff

README.md

@@ -578,7 +578,7 @@
       <link-domain value="yourcustomdomain.com" />
       <link-domain value="cordova.app.link" />  <!-- optional previous link domain -->
       <link-domain value="bnc.lt" />  <!-- optional previous link domain -->
-      <ios-team-release value="PW4Q8885U7" />
+      <ios-team-release value="PW4Q8885U7" /> <!-- required if iOS app -->
       <ios-team-debug value="FG35JLLMXX" /> <!-- optional -->
       <android-prefix value="/WSuf" /> <!-- optional (for bnc.lt) -->
       <android-testmode value="true" /> <!-- optional (simulate installs) -->