Help: Fix typos in presets schema field descriptions
Original Description
There's one typo and some inconsistencies in the schema.json (descriptions) for ctest presets. This MR corrects the ones I spotted. Separate commits for distinct kinds of things I spotted in the descriptions, but should be squashed down to one "fix typo's" commit in the end.
Backport: release:HEAD~1^2
Edited by Brad King