Added icons credits to README

Author: K0SS4

README.md

@@ -2,6 +2,10 @@
 Simple QT6 application to logout/reboot/poweroff your system.  
 Tried to make it as distro/wm/de independent as possible, but it still relies on systemctl to poweroff/reboot.
 
+Icons taken from:  
+[Ikonate](https://ikonate.com/)  
+[Glyphs](https://glyphs.fyi/)
+
 # Shortcuts
 p - poweroff  
 r - reboot