## About the changes
Prometheus metrics should not be exposed to the public. Added a note about this to inform people that internal endpoints should be dropped on external access.
## Discussion points
https://unleash-community.slack.com/archives/CGP2MCHPF/p1666688295670459
## Commits
* [docs]: Update Prometheus docs with security info
* Apply suggestions from code review
Co-authored-by: Thomas Heartman <thomas@getunleash.ai>
* Add info about Prometheus security
Co-authored-by: Thomas Heartman <thomas@getunleash.ai>
