Merge pull request #178 from EricPaulson/patch-1

Update index.md

Author: fitn

docs/index.md

@@ -5,7 +5,7 @@ The custom entity bundle provides the following tools to help managing custom en
 * [Reference data cookbook](cookbook.md)
 * [Abstract entities and repositories](abstract_entities_and_repositories.md)
 * [CRUD interface](crud_interface.md)
-* [CRUD managers](crud_managers.mb)
+* [CRUD managers](crud_managers.md)
 
 ## User Interface