docs: List more commit-message tags in "submitting-a-patch"

Add some more examples of commonly used commit-message tags.

(Thanks: Alex Bennée)

Signed-off-by: Kashyap Chamarthy <kchamart@redhat.com>
Message-Id: <20211119193118.949698-3-kchamart@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
1 file changed