autofunction:: xdist.is_xdist_master generates incorrect description

[TB-HunBoka]

On the https://pytest-xdist.readthedocs.io/en/stable/how-to.html#xdist.is_xdist_master url, for me the description is:
Return True if this is the xdist controller, False otherwise.

Based on the original ticket: #504
It should be:
Return True if this is the xdist master, False otherwise.