[EGD-7938] Update CONTRIBUTING.md

Updated CONTRIBUTING.md to include `Luts.bin`.

Author: wojtekidd

CONTRIBUTING.md

@@ -4,7 +4,7 @@ MuditaOS is an Open Source project and we're more than happy to receive contribu
 
 Before contributing please read and accept our [Code of Conduct](./CODE_OF_CONDUCT.md).
 
-**Note:** You will be able to test your contributions only on [Mudita Pure Simulator](./doc/howto_simulator.md). You won't be able to produce a build for Mudita Pure yourself, since the operating system contains a a piece of proporietary software from E Ink Holdings Inc., namely `luts.bin` - a small program the E Ink display executes each time you refresh it.
+**Note:** You will be able to test your contributions only on [Mudita Pure Simulator](./doc/howto_simulator.md). You won't be able to produce a build for Mudita Pure yourself, since the operating system contains a piece of proporietary software from E Ink Holdings Inc., namely `luts.bin` - a small program the E Ink display executes each time you refresh it.
 
 ## Reporting bugs