Update iOS SDK to 5.5.3

Author: github-actions[bot]

OneSignalCapacitorPlugin.podspec

@@ -1,7 +1,7 @@
 require 'json'
 
 package = JSON.parse(File.read(File.join(__dir__, 'package.json')))
-onesignal_xcframework_version = '5.5.2'
+onesignal_xcframework_version = '5.5.3'
 onesignal_disable_location_env = ENV['ONESIGNAL_DISABLE_LOCATION'].to_s.strip.downcase
 onesignal_disable_location = ['true', '1'].include?(onesignal_disable_location_env)