update readme

README.md

@@ -7,6 +7,7 @@
 | 3 | [MVP Pattern and Repositories](3-mvc-pattern-and-repositories.md) | [Download slides](3-mvc-pattern-and-repositories-slides.html?raw=1) |
 | 4 | [RESTful HTTP Methods](4-restful-http-methods.md) | [Download slides](4-restful-http-methods-slides.html?raw=1) |
 | 5 | [Model Validation & API Design](5-model-validation-and-designing-apis.md) | [Download slides](5-model-validation-and-designing-apis-slides.html?raw=1) |
-| 6 | [SQL](6-databases-with-entity-framework.md) | [Download slides](6-databases-with-entity-framework-slides.html?raw=1) |
+|   | [SQL Databases](sql-databases.md) | [Download slides](sql-databases-slides.html?raw=1) |
+| 6 | [Databases with Entity Framework](6-databases-with-entity-framework.md) | [Download slides](6-databases-with-entity-framework-slides.html?raw=1) |
 | 7 | [Authentication & Authorization](7-authentication-and-authorization.md) | [Download slides](7-authentication-and-authorization-slides.html?raw=1) |
 | 8 | [Testing](8-testing.md) | [Download slides](8-testing-slides.html?raw=1) |