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

Improve Gitaly HA docs Closes gitaly#2470 See merge request gitlab-org/gitlab!25402

Merge branch 'docs/jramsay/gitaly-ha' into 'master'
c30132ac · Achilleas Pipinellis · 51d962d2 · 6239d350 · c30132ac · c30132ac
--- a/doc/administration/gitaly/img/praefect_architecture_v12_9.png
+++ b/doc/administration/gitaly/img/praefect_architecture_v12_9.png
--- a/doc/administration/gitaly/praefect.md
+++ b/doc/administration/gitaly/praefect.md