MINOR: Fix wrong configuration in Adding and Removing Listeners docs (#11992)
MINOR: Fix wrong configuration in Adding and Removing Listeners docs (#11992)


Reviewers: Mickael Maison <9e7363571ad6c9fdd8a7f0491d2e413bdf6275ab@gmail.com>
guozhangwang/kafka,apache/kafka,guozhangwang/kafka,apache/kafka,apache/kafka,lindong28/kafka,guozhangwang/kafka,apache/kafka,guozhangwang/kafka,lindong28/kafka,lindong28/kafka,lindong28/kafka