Update overview.md

Author: larrytin

docs/reference/kubectl/overview.md

@@ -19,7 +19,7 @@ where `command`, `TYPE`, `NAME`, and `flags` are:
 
 * `command`: Specifies the operation that you want to perform on one or more resources, for example `create`, `get`, `describe`, `delete`.
 
-* `TYPE`: Specifies the [resource type](#resource-types). Resource types are case-sensitive and you can specify the singular, plural, or abbreviated forms. For example, the following commands produce the same output:
+* `TYPE`: Specifies the [resource type](#resource-types). Resource types are case-insensitive and you can specify the singular, plural, or abbreviated forms. For example, the following commands produce the same output:
 
       $ kubectl get pod pod1
       $ kubectl get pods pod1