Broken Link in top level README.md

[daneabernathy]

The page referenced in the top level README.md of this repository for PaperCut's Health Monitoring API Reference is a dead link.
It is in the For more information section section.

Here's the broken link:
https://www.papercut.com/products/ng/manual/common/topics/tools-monitor-system-health-api-overview.html

Can this be updated to link to the new location of the System Health API Overview?