Documentation/process/howto.rst: add a missing cross-reference

Add a missing cross-reference from Documentation/process/howto.rst
to Documentation/admin-guide/README.rst.

Signed-off-by: Michael Rodin <michael-git@rodin.online>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Michael Rodin 2018-06-03 20:17:33 +02:00 • committed by Jonathan Corbet
commit dad0513954