Merge pull request #733 from mhurne/patch-2

Fix spelling error in README.md

README.md

@@ -13,7 +13,7 @@ The goal of Swagger™ is to define a standard, language-agnostic interface to R
 Check out [Swagger-Spec](https://github.com/swagger-api/swagger-spec) for additional information about the Swagger project, including additional libraries with support for other languages and more. 
 
 
-## Compatability
+## Compatibility
 The Swagger Specification has undergone 3 revisions since initial creation in 2010.  The swagger-ui project has the following compatibilies with the swagger specification:
 
 Swagger UI Version | Release Date | Swagger Spec compatability | Notes | Status