feat: update ci

ios/Podfile

@@ -1,5 +1,5 @@
 # Uncomment this line to define a global platform for your project
-platform :ios, '14.0'
+platform :ios, '15.0'
 
 # CocoaPods analytics sends network stats synchronously affecting flutter build latency.
 ENV['COCOAPODS_DISABLE_STATS'] = 'true'
@@ -40,7 +40,7 @@ post_install do |installer|
   installer.pods_project.targets.each do |target|
     flutter_additional_ios_build_settings(target)
     target.build_configurations.each do |config|
-      config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '14.0'
+      config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '15.0'
       config.build_settings['CLANG_ALLOW_NON_MODULAR_INCLUDES_IN_FRAMEWORK_MODULES'] = 'YES'
       # Disable code signing for all Pod targets — only Runner needs signing
       config.build_settings['CODE_SIGNING_ALLOWED'] = 'NO'