## About the changes
Adds more specifics to addon notifications when a flexibleRollout is
updated.
- [x] Specific text for all strategy types
- [x] Add constraint differences for all strategy types
<!-- Does it close an issue? Multiple? -->
Closes [#3140](https://github.com/Unleash/unleash/issues/3140)
* fix: slack back link url to point to the feature page
* update snapshots
* update feature link in case project info is available in event
* update missing snapshot
