Add JUNO and OSMO icons

[terencelimzhengwei]

Hi Pierre,

I've referenced your commits for adding new ICONs and have included two new icons by updating the IconHelper.php file

1) #48574 - OSMO 2) #48777 - JUNO

Can you help to review and update the application if all is good?

Thanks so much for all the great work for this amazing app!

[pgrimaud]

Thank you 🎉