From: Caleb Hill <chill389cc@gmail.com>

This pr fixes a typo I noticed today while reading documentation here:
https://git-scm.com/docs/git-clean#Documentation/git-clean.txt-quit

Signed-off-by: Caleb Hill <chill389cc@gmail.com>

Submitted-As: https://lore.kernel.org/git/pull.1572.git.git.1694800409471.gitgitgadget@gmail.com