MINOR: Fix code section formatting in TROGDOR.md (#6720)
MINOR: Fix code section formatting in TROGDOR.md (#6720)

Due to the lack of a blank line, a code section in TROGDOR.md
is not properly rendered. This PR fixes it.

Reviewers: Jason Gustafson <68c46a606457643eab92053c1c05574abb26f861@confluent.io>
Chasego/kafka,apache/kafka,sslavic/kafka,guozhangwang/kafka,guozhangwang/kafka,Chasego/kafka,sslavic/kafka,sslavic/kafka,noslowerdna/kafka,noslowerdna/kafka,lindong28/kafka,sslavic/kafka,TiVo/kafka,KevinLiLu/kafka,TiVo/kafka,KevinLiLu/kafka,guozhangwang/kafka,KevinLiLu/kafka,lindong28/kafka,guozhangwang/kafka,TiVo/kafka,noslowerdna/kafka,noslowerdna/kafka,apache/kafka,KevinLiLu/kafka,Chasego/kafka,Chasego/kafka,apache/kafka,TiVo/kafka,apache/kafka,lindong28/kafka,lindong28/kafka