docs: netdev: rephrase the 'should I update patchwork' question

Make the question shorter and adjust the start of the answer accordingly.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>