In the FreeBSD documentation project, headings are title case following
older American publishing tradition. Google and Microsoft style guides
have switched to sentence case, but I for one like our old world style
and the quality it usually implies, and want to carry that torch.
There are different style houses have subtle nuances on what constitutes
a "small word", and I do not think there is anything to be gained from
doing a whole bikeshed on which one to follow and then trying to get all
the docs to use that consistently. For now, fix this consistently on the
writing style page without adding a new rule.
PR: 296223