tc-testing: Add link for reviews with TC MAINTAINERS

Signed-off-by: NJamal Hadi Salim <jhs@mojatatu.com>
Acked-by: NCong Wang <cong.wang@bytedance.com>
Link: https://lore.kernel.org/r/20211122144252.25156-1-jhs@emojatatu.comSigned-off-by: NJakub Kicinski <kuba@kernel.org>

MAINTAINERS

@@ -18483,6 +18483,7 @@ F:	include/uapi/linux/pkt_sched.h
 F:	include/uapi/linux/tc_act/
 F:	include/uapi/linux/tc_ematch/
 F:	net/sched/
+F:	tools/testing/selftests/tc-testing
 
 TC90522 MEDIA DRIVER
 M:	Akihiro Tsukada <tskd08@gmail.com>