Merge branch 'gitaly-ha-docs' into 'master'

Cross-link Gitaly Cluster for HA

See merge request gitlab-org/gitlab!32028

doc/administration/high_availability/gitaly.md

@@ -4,12 +4,8 @@ type: reference
 
 # Configuring Gitaly for Scaled and High Availability
 
-Gitaly does not yet support full high availability. However, Gitaly is quite
-stable and is in use on GitLab.com. Scaled and highly available GitLab environments
-should consider using Gitaly on a separate node.
-
-See the [Gitaly HA Epic](https://gitlab.com/groups/gitlab-org/-/epics/289) to
-track plans and progress toward high availability support.
+A [Gitaly Cluster](../gitaly/praefect.md) can be used to increase the fault
+tolerance of Gitaly in high availability configurations.
 
 This document is relevant for [scalable and highly available setups](../reference_architectures/index.md).