Mention that events are published multiple times, and in lifecycle hooks of a module in v5

[Tschakki]

Description

• Add a note that mentions that every events is currently published multiple times in SDK v5. This behaviour will be fixed in v6.
• Emphasize, you can only publish events in the lifecycle hooks of a module (will change in v6)

URL

https://lisk.com/documentation/lisk-sdk/advanced-explanations/communication.html#how-to-publish-and-subscribe-to-events

Additional information