Merge upstream da78468 into feature/docker-support

PR redis#3324: cancun maint 2
- 8-0-18-14-may2026.md: bump OLM operator bundle 8.0.18-14.0 -> 8.0.18-14.2
- 8-0-20-releases/8-0-20-21-may2026.md: new release notes for 8.0.20-21
- 8-0-20-releases/_index.md: new index page for 8.0.20 release notes dir

Safe: fork unmodified, content only, no pillar impact.

This is the 5th and final PR from upstream's 2026-05-15 batch.
feature/docker-support is now fully caught up with origin/main.

Author: EliShteinman

content/operate/kubernetes/release-notes/8-0-18-releases/8-0-18-14-may2026.md

@@ -24,7 +24,7 @@ This is a maintenance release to support Redis Enterprise Software version 8.0.1
 
 ### OpenShift downloads
 
-- **OLM operator bundle**: `8.0.18-14.0`
+- **OLM operator bundle**: `8.0.18-14.2`
 - **Redis Enterprise**: `registry.connect.redhat.com/redislabs/redis:8.0.18-36.14` (`registry.connect.redhat.com/redislabs/redis:8.0.18-36.14.minimal` for minimal base image)
 - **Operator**: `registry.connect.redhat.com/redislabs/operator:8.0.18-14`
 - **Services Rigger**: `registry.connect.redhat.com/redislabs/k8s-controller:8.0.18-14`

content/operate/kubernetes/release-notes/8-0-20-releases/8-0-20-21-may2026.md

@@ -0,0 +1,35 @@
+---
+alwaysopen: false
+categories:
+- docs
+- operate
+- kubernetes
+description: This is a maintenance release to support Redis Enterprise Software version 8.0.20-19.
+hideListLinks: true
+linkTitle: 8.0.20-21 (May 2026)
+title: Redis Enterprise for Kubernetes 8.0.20-21 (May 2026) release notes
+weight: 30
+---
+
+## Highlights
+
+This is a maintenance release to support Redis Enterprise Software version 8.0.20-19. For version changes, supported distributions, and known limitations, see the [release notes for 8.0.18-11 (April 2026)]({{<relref "/operate/kubernetes/release-notes/8-0-18-releases/8-0-18-11-april2026">}}).
+
+## Downloads
+
+- **Redis Enterprise**: `redislabs/redis:8.0.20-19.21` (`redislabs/redis:8.0.20-19.21.minimal` for minimal base image)
+- **Operator**: `redislabs/operator:8.0.20-21`
+- **Services Rigger**: `redislabs/k8s-controller:8.0.20-21`
+- **Call Home Client**: `redislabs/re-call-home-client:8.0.20-21`
+
+### OpenShift downloads
+
+- **OLM operator bundle**: `8.0.20-21.0`
+- **Redis Enterprise**: `registry.connect.redhat.com/redislabs/redis:8.0.20-19.21` (`registry.connect.redhat.com/redislabs/redis:8.0.20-19.21.minimal` for minimal base image)
+- **Operator**: `registry.connect.redhat.com/redislabs/operator:8.0.20-21`
+- **Services Rigger**: `registry.connect.redhat.com/redislabs/k8s-controller:8.0.20-21`
+- **Call Home Client**: `registry.connect.redhat.com/redislabs/call-home-client:8.0.20-21`
+
+## Known limitations
+
+See [8.0.20 releases]({{<relref "/operate/kubernetes/release-notes/8-0-20-releases/">}}) for information on known limitations.

content/operate/kubernetes/release-notes/8-0-20-releases/_index.md

@@ -0,0 +1,22 @@
+---
+alwaysopen: false
+categories:
+- docs
+- operate
+- kubernetes
+description: Releases with support for Redis Enterprise Software 8.0.20
+hideListLinks: true
+linkTitle: 8.0.20 releases
+title: Redis Enterprise for Kubernetes 8.0.20 release notes
+weight: 84
+---
+
+Redis Enterprise for Kubernetes 8.0.20-21 is a maintenance release of [Redis Enterprise for Kubernetes 8.0.18]({{<relref "/operate/kubernetes/release-notes/8-0-18-releases/">}}). The latest release is 8.0.20-21 with support for Redis Enterprise Software version 8.0.20-19.
+
+## Detailed release notes
+
+{{<table-children columnNames="Version&nbsp;(Release&nbsp;date)&nbsp;,Major changes" columnSources="LinkTitle,Description" enableLinks="LinkTitle">}}
+
+## Known limitations
+
+See the [8.0.18-11 (April 2026) release notes]({{<relref "/operate/kubernetes/release-notes/8-0-18-releases/8-0-18-11-april2026">}}) for supported distributions and known limitations.