Documentation: fix coding-style.rst Sphinx warning

Fix Sphinx warning in coding-style.rst:

Documentation/process/coding-style.rst:446: WARNING: Inline interpreted text or phrase reference start-string without end-string.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
1 file changed