locking: Mark sentence-ending period as such

Silence warning from "make punctcheck":

    vvv Hint: sentence ending with an uppercase needs "\@." vvv
    ./locking/locking.tex:2039:traditionally used in scheduling disk I/O.

It is needed because commit 678e6cc3c0f1 ("locking: Cite Dice et al.
for hierarchical lock") have added a sentence in the paragraph.

Fixes: 678e6cc3c0f1 ("locking: Cite Dice et al. for hierarchical lock")
Signed-off-by: Akira Yokosawa <akiyks@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
1 file changed