Fix document for core-bean.adoc

This is the orginal "A bean is an object that is instantiated, assembled, and otherwise managed by a Spring IoC container". Here's an extra word of "otherwise".

Author: York Lee

src/docs/asciidoc/core/core-beans.adoc

@@ -42,7 +42,7 @@ information on using the `BeanFactory` instead of the `ApplicationContext,` see
 
 In Spring, the objects that form the backbone of your application and that are managed
 by the Spring IoC container are called beans. A bean is an object that is
-instantiated, assembled, and otherwise managed by a Spring IoC container. Otherwise, a
+instantiated, assembled, and managed by a Spring IoC container. Otherwise, a
 bean is simply one of many objects in your application. Beans, and the dependencies
 among them, are reflected in the configuration metadata used by a container.