[ImgBot] Optimize images

[imgbot[bot]]

Beep boop. Your images are optimized!

Your image file size has been reduced by 17% 🎉

Details

File	Before	After	Percent reduction
/osx.png	179.88kb	137.13kb	23.77%
/windows.png	216.10kb	187.54kb	13.22%
/gui/images/logo.png	31.39kb	28.84kb	8.10%
Total :	427.37kb	353.50kb	17.28%

---

Black Lives Matter | 💰 donate | 🎓 learn | ✍🏾 sign

📝 docs | :octocat: repo | 🙋🏾 issues | 🏅 swag | 🏪 marketplace