Documentation: networking: correct spelling

Correct spelling problems for Documentation/networking/ as reported
by ispell.

Signed-off-by: Jing-Ping Jan <zoo868e@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20240812170910.5760-1-zoo868e@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>