Update README.md

Author: JoanStinson

README.md

@@ -23,7 +23,7 @@ A tiny retro action RPG implementation made applying Software Design Patterns to
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 * **🔊 Behavioral Patterns**
-    * Define a concrete communication scheme between objects..
+    * Define a concrete communication scheme between objects.
 * **🐣 Creational Patterns**
     * Create objects, rather than instantiating them directly.
 * **✂️ Decoupling Patterns**