MINOR: Add clarifying "additionally" to streams aggregator docs that is missing in one place. (#8237)
MINOR: Add clarifying "additionally" to streams aggregator docs that is missing in one place. (#8237)

Reviewer: Matthias J. Sax <e388d34fd3c0456122779e95f262c0d70198a168@confluent.io>
apache/kafka,guozhangwang/kafka,sslavic/kafka,lindong28/kafka,sslavic/kafka,guozhangwang/kafka,TiVo/kafka,guozhangwang/kafka,sslavic/kafka,apache/kafka,TiVo/kafka,lindong28/kafka,Chasego/kafka,Chasego/kafka,TiVo/kafka,Chasego/kafka,apache/kafka,apache/kafka,guozhangwang/kafka,TiVo/kafka,sslavic/kafka,Chasego/kafka,lindong28/kafka,lindong28/kafka