docs: update main README.md after assignment 04

Author: MatyMasaryk

README.md

@@ -1,10 +1,12 @@
 # Masaryk_103043_feippds
 Repository for PPDS LS 2022/2023, student Maty Masaryk.
 
-**Assignments:**
+## Assignments:
 
 [01: Bakery Algorithm](https://github.com/MatyMasaryk/Masaryk_103043_feippds/tree/01)
 
 [02: Barber Shop](https://github.com/MatyMasaryk/Masaryk_103043_feippds/tree/02)
 
 [03: Dining Philosophers](https://github.com/MatyMasaryk/Masaryk_103043_feippds/tree/03)
+
+[04: Feasting Savages](https://github.com/MatyMasaryk/Masaryk_103043_feippds/tree/04)