[kafka] changed default Kafka broker port
[kafka] changed default Kafka broker port

changed the default Kafka broker port listed in the configuration to the _actual_ default port

[skip ci]
jyogi/purvar-agent,Wattpad/dd-agent,manolama/dd-agent,pmav99/praktoras,Wattpad/dd-agent,cberry777/dd-agent,brettlangdon/dd-agent,c960657/dd-agent,Wattpad/dd-agent,indeedops/dd-agent,jyogi/purvar-agent,pmav99/praktoras,jyogi/purvar-agent,takus/dd-agent,c960657/dd-agent,tebriel/dd-agent,brettlangdon/dd-agent,c960657/dd-agent,cberry777/dd-agent,indeedops/dd-agent,tebriel/dd-agent,jyogi/purvar-agent,pmav99/praktoras,indeedops/dd-agent,takus/dd-agent,c960657/dd-agent,gphat/dd-agent,Wattpad/dd-agent,tebriel/dd-agent,c960657/dd-agent,jyogi/purvar-agent,indeedops/dd-agent,tebriel/dd-agent,takus/dd-agent,cberry777/dd-agent,takus/dd-agent,manolama/dd-agent,Wattpad/dd-agent,brettlangdon/dd-agent,cberry777/dd-agent,brettlangdon/dd-agent,gphat/dd-agent,gphat/dd-agent,gphat/dd-agent,gphat/dd-agent,indeedops/dd-agent,pmav99/praktoras,pmav99/praktoras,tebriel/dd-agent,manolama/dd-agent,cberry777/dd-agent,manolama/dd-agent,manolama/dd-agent,takus/dd-agent,brettlangdon/dd-agent