doc: fix broken link in gerrit.rst

Not sure which was the original link, but naming_conventions seems
like the sensible place where the document should be pointing to.

Change-Id: I12f8317578b33371765605786735c30aadb92b77
Signed-off-by: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
1 file changed