## What & why
This update does three things:
1. Adjusts the environment cloning feature availability notice: because
this has been released.
2. Updates the availability notice for environments (to conform with the
standard docusaurus way of doing things): for consistency
3. Add a brief explanation of environment types: because this isn't
documented anywhere
## Sources
The note about how environment types work is sourced from this old
[slack thread (internal to the
team)](https://unleash-community.slack.com/archives/G01MU2Q49QC/p1659600175175769)
