MINOR: Add note on IDEMPOTENT_WRITE ACL to notable changes (#12260)
MINOR: Add note on IDEMPOTENT_WRITE ACL to notable changes (#12260)

Update notable changes documentation to mention requiring IDEMPOTENT_WRITE permission
when producing messages with default/idempotent configuration and broker version lower than
2.8.0.

Reviewers: Ismael Juma <0794a5c7e497910d682bf2c54c66cc30760c0221@juma.me.uk>, Luke Chen <showuon@gmail.com>
guozhangwang/kafka,guozhangwang/kafka,apache/kafka,apache/kafka,apache/kafka,guozhangwang/kafka,apache/kafka,guozhangwang/kafka