website/docs: add 2021.5 to sidebar

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

website/docs/releases/v2021.5.md

@@ -1,5 +1,6 @@
 ---
-title: Next
+title: Release 2021.5
+slug: "2021.5"
 ---
 
 ## Headline Changes
@@ -71,4 +72,8 @@ The public port of the compose stack has been changed from 443 to 9000 and 9443
 
 ### Kubernetes
 
-Run `helm repo update` and then upgrade your release with `helm upgrade authentik authentik/authentik -f values.yaml`.
+The helm chart has been rewritten by [@dirtycajunrice](https://github.com/dirtycajunrice) and now lives on `https://helm.goauthentik.io`.
+
+Please upgrade to the new chart using values from [ArtifactHub](https://artifacthub.io/packages/helm/goauthentik/authentik).
+
+The old repository will stil exist for backwards-compatibility.

website/sidebars.js

@@ -142,6 +142,7 @@ module.exports = {
             type: "category",
             label: "Release Notes",
             items: [
+                "releases/v2021.5",
                 "releases/v2021.4",
                 "releases/v2021.3",
                 "releases/v2021.2",