Update README.md

README.md

@@ -16,7 +16,7 @@ You can find a working example to learn how to use the framework here:
 
 ## Articles
 
-**Svelto users articles (note they may use outdated version of Svelto):**
+**Svelto users articles (note they may use an outdated version of Svelto):**
 
 * https://eagergames.wordpress.com/category/ecs/ (Dario Oliveri)
 * https://blogs.msdn.microsoft.com/uk_faculty_connection/2018/05/08/entity-component-system-in-unity-a-tutorial/ (Lee Stott)