Update README.md

Author: neochief

README.md

@@ -4,7 +4,7 @@ This repository is part of the [Refactoring.Guru](https://refactoring.guru/desig
 
 It contains C++ examples for all classic GoF design patterns. Each pattern includes two examples:
 
-- [ ] **Conceptual** examples show the internal structure of patterns with detailed comments.
+- [x] **Conceptual** examples show the internal structure of patterns with detailed comments.
 - [ ] **RealWold** examples show how the patterns can be used in a real-world C++ application.