Update default value for fontsize in navigation title and subtitle (#5868)
Update default value for fontsize in navigation title and subtitle (#5868)

Co-authored-by: Yogev Ben David <44d0f5c317c3a4af182802840d84643559add743@wix.com>

wix/react-native-navigation,guyca/react-native-navigation,3sidedcube/react-native-navigation,wix/react-native-navigation,3sidedcube/react-native-navigation,guyca/react-native-navigation,wix/react-native-navigation,3sidedcube/react-native-navigation,wix/react-native-navigation,3sidedcube/react-native-navigation,wix/react-native-navigation,guyca/react-native-navigation,wix/react-native-navigation,guyca/react-native-navigation