Add Geo upgrade to 13.0 demo to validation tests

doc/administration/geo/replication/geo_validation_tests.md

@@ -16,11 +16,22 @@ This section contains a journal of recent validation tests and links to the rele
 
 The following are GitLab upgrade validation tests we performed.
 
+### July 2020
+
+[Upgrade Geo multi-node installation](https://gitlab.com/gitlab-org/gitlab/-/issues/225359):
+
+- Description: Tested upgrading from GitLab 12.10.12 to 13.0.10 package in a multi-node
+  configuration. As part of the issue to [Fix zero-downtime upgrade process/instructions for multi-node Geo deployments](https://gitlab.com/gitlab-org/gitlab/-/issues/22568), we monitored for downtime using the looping pipeline, HAProxy stats dashboards, and a script to log readiness status on both nodes.
+- Outcome: Partial success because we observed downtime during the upgrade of the primary and secondary sites.
+- Follow up issues/actions:
+  - [Investigate why `reconfigure` and `hup` cause downtime on multi-node Geo deployments](https://gitlab.com/gitlab-org/gitlab/-/issues/228898)
+  - [Geo multi-node deployment upgrade: investigate order when upgrading non-deploy nodes](https://gitlab.com/gitlab-org/gitlab/-/issues/228954)
+
 ### June 2020
 
-[Upgrade Geo multi-server installation](https://gitlab.com/gitlab-org/gitlab/-/issues/223284):
+[Upgrade Geo multi-node installation](https://gitlab.com/gitlab-org/gitlab/-/issues/223284):
 
-- Description: Tested upgrading from GitLab 12.9.10 to 12.10.12 package in a multi-server
+- Description: Tested upgrading from GitLab 12.9.10 to 12.10.12 package in a multi-node
   configuration. Monitored for downtime using the looping pipeline and HAProxy stats dashboards.
 - Outcome: Partial success because we observed downtime during the upgrade of the primary and secondary sites.
 - Follow up issues/actions:
@@ -28,9 +39,9 @@ The following are GitLab upgrade validation tests we performed.
   - [Geo:check Rake task: Exclude AuthorizedKeysCommand check if node not running Puma/Unicorn](https://gitlab.com/gitlab-org/gitlab/-/issues/225454)
   - [Update instructions in the next upgrade issue to include monitoring HAProxy dashboards](https://gitlab.com/gitlab-org/gitlab/-/issues/225359)
 
-[Upgrade Geo multi-server installation](https://gitlab.com/gitlab-org/gitlab/-/issues/208104):
+[Upgrade Geo multi-node installation](https://gitlab.com/gitlab-org/gitlab/-/issues/208104):
 
-- Description: Tested upgrading from GitLab 12.8.1 to 12.9.10 package in a multi-server
+- Description: Tested upgrading from GitLab 12.8.1 to 12.9.10 package in a multi-node
   configuration.
 - Outcome: Partial success because we did not run the looping pipeline during the demo to validate
   zero-downtime.