Clean up README by removing UART comments

Removed commented-out section for UART topics.

Author: RatkoFri

README.md

@@ -21,8 +21,7 @@ These notes are intended solely for educational purposes. They are not a replace
 ### Part II: Modeling Digital Systems with SystemVerilog
 - [2.1 Introduction to VGA controller](./05-VGA.md)
 - [2.2 VGA Controller Implementation](./06-VGA.md)
-
- <!---
+ <!--
 - [2.3 Intro to UART and FSM](./07-UART.md)
 - [2.4 UART Implementation](./08-UART.md)