Merge pull request #5878 from posquit0/patch-1

Fix mis-typings in documentation.

docs/instance_groups.md

@@ -245,7 +245,7 @@ spec:
 Kops utilizes cloud-init to initialize and setup a host at boot time. However in certain cases you may already be leveraging certain features of cloud-init in your infrastructure and would like to continue doing so. More information on cloud-init can be found [here](http://cloudinit.readthedocs.io/en/latest/)
 
 
-Additional user-user data can be passed to the host provisioning by setting the `AdditionalUserData` field. A list of valid user-data content-types can be found [here](http://cloudinit.readthedocs.io/en/latest/topics/format.html#mime-multi-part-archive)
+Additional user-data can be passed to the host provisioning by setting the `additionalUserData` field. A list of valid user-data content-types can be found [here](http://cloudinit.readthedocs.io/en/latest/topics/format.html#mime-multi-part-archive)
 
 Example:
 ```