Old Siacentral reference

[CtrlAltDefeat94]

The docs reference the old host explorer on Siacentral.

docs/hosting/about-hosting-on-sia.md

Line 142 in f38819b

We have an incredible community building on Sia. Third-party sites can develop their methods for scoring storage providers based on various metrics. For example, Sia Central has developed a [Host Browser](https://hosts.siacentral.com/), which allows you to browse and compare storage providers.

This should probably be replaced by https://siagraph.info/host_explorer and/or https://hostscore.info