Update check_mode attributes to correct description and add details

[briantist]

SUMMARY

When I added attributes in #320 I didn't quite use check_mode correctly.
The description should be a general description of the attribute (what to expect from check mode), and details about how the particular module implements it should be added in a list under details, which will render underneath the support field in the docs.

Should update these to correct them.

Example:

• Add robot action group; use attributes to document module capabilities community.hrobot#65

ISSUE TYPE

• Documentation Report