4.1.0 release notes edits

Author: michaelklishin

release-notes/4.1.0.md

@@ -59,10 +59,16 @@ Clients that do override `frame_max` now must use values of 8192 bytes or greate
 We recommend using the default server value of `131072`: do not override the `frame_max`
 key in `rabbitmq.conf` and do not set it in the application code.
 
+### Node.js `amqplib` Must Be Upgraded
+
 [`amqplib`](https://github.com/amqp-node/amqplib/) is a popular client library that has been using
 a low `frame_max` default of `4096`. Its users must [upgrade to a compatible version](https://github.com/amqp-node/amqplib/blob/main/CHANGELOG.md#v0107)
 (starting with `0.10.7`) or explicitly use a higher `frame_max`.
 
+`amqplib` versions older than `0.10.7` will not be able to connect to
+RabbitMQ 4.1.0 and later versions due to the initial AMQP 0-9-1 maximum frame size
+increase covered above.
+
 
 ### MQTT