feat(react-native): add aliases for iPhone 12 (#9792)

plugins/react-native/react-native.plugin.zsh

@@ -27,6 +27,9 @@ alias rniosxr='react-native run-ios --simulator "iPhone Xʀ"'
 alias rnios11='react-native run-ios --simulator "iPhone 11"'
 alias rnios11p='react-native run-ios --simulator "iPhone 11 Pro"'
 alias rnios11pm='react-native run-ios --simulator "iPhone 11 Pro Max"'
+alias rnios12='react-native run-ios --simulator "iPhone 12"'
+alias rnios12p='react-native run-ios --simulator "iPhone 12 Pro"'
+alias rnios12pm='react-native run-ios --simulator "iPhone 12 Pro Max"'
 
 
 # iPad