Documentation: process/submitting-patches: misspelling "mesages"

Fix spelling mistakes, "mesages" should be spelled "messages".

Signed-off-by: Rong Tao <rtoax@foxmail.com>
Link: https://lore.kernel.org/r/tencent_924BF0B25425E2D5673409D1CF604F682505@qq.com


Signed-off-by: Jonathan Corbet <corbet@lwn.net>