duplicate symbol '_OBJC_CLASS_$_FCM' in: code example

Example: duplicate symbol '_OBJC_CLASS_$_FCM' in:

// in podfile, comment or delete the following line:
pod 'CapacitorCommunityFcm', :path => '../../node_modules/@capacitor-community/fcm'
// then restart pod
cd ios/App/ && pod deintegrate && pod install && cd ../..