Documentation: netconsole: Remove obsolete contact people

Breno Leitao has been listed in MAINTAINERS as netconsole maintainer
since 7c938e43 ("MAINTAINERS: make Breno the netconsole
maintainer"), but the documentation says otherwise that bug reports
should be sent to original netconsole authors.

Remove obsolate contact info.

Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://patch.msgid.link/20251028132027.48102-1-bagasdotme@gmail.com


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