callback plugins require more that a maintainer shipit comment.

[rrey]

Hi,

in bot help page the following can be read for merge conditions on community maintained modules:

If you are maintainer of the module or maintainer of a module in the same namespace, only one shipit is required.

It seems that the behavior is not applied on callback plugins.
Here are 2 PR where I am maintainer of the callback, and my shipit comment was not enough to trigger the bot shipit labeling:
ansible/ansible#57629
ansible/ansible#57575

I had to ask for help on IRC.
Is there a reason for not applying the same merge conditions on callbacks ?