Update README.md

MitkoVtori · web-flow · commit 87ce6a7c127f · 2023-02-21T17:36:37.000+02:00
diff --git a/OOP/README.md b/OOP/README.md
@@ -3,3 +3,4 @@
 | <a href="1.First Steps in OOP">First Steps in OOP</a>     | 
 | ------------------------ |
 | <a href="1.First Steps in OOP/First Steps in OOP - Lab">First Steps in OOP</a>     |
+| <a href="1.First Steps in OOP/First Steps in OOP - Exercise">Exercise: First Steps in OOP</a> |
