doc:it_IT: fix locking.rst section title

This title was still in English. I just translated it

Signed-off-by: Federico Vaga <federico.vaga@vaga.pv.it>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Federico Vaga 2018-11-09 00:24:16 +01:00 • committed by Jonathan Corbet
commit 34523ec2f4