tc-testing: Add link for reviews with TC MAINTAINERS

Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Cong Wang <cong.wang@bytedance.com>
Link: https://lore.kernel.org/r/20211122144252.25156-1-jhs@emojatatu.com


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