docs: add v2.4 changes to CHANGELOG.md (#9321)

* docs: add v2.4 changes to CHANGELOG.md

Signed-off-by: Alexander Matyushentsev <AMatyushentsev@gmail.com>

* docs: update 2.3-2.4 upgrading instructions

Signed-off-by: Alexander Matyushentsev <AMatyushentsev@gmail.com>

CHANGELOG.md

@@ -1,6 +1,55 @@
 # Changelog
 
-## v2.3.0
+## v2.4.0 (Unreleased)
+
+### Web Terminal In Argo CD UI
+
+Feature enables engineers to start a shell in the running application container without leaving the web interface. Just find the required Kubernetes
+Pod using the Application Details page, click on it and select the Terminal tab. The shell starts automatically and enables you to execute the required
+commands, and helps to troubleshoot the application state.
+
+### Access Control For Pod Logs & Web Terminal
+
+Argo CD is used to manage the critical infrastructure of multiple organizations, which makes security the top priority of the project. We've listened to
+your feedback and introduced additional access control settings that control access to Kubernetes Pod logs and the new Web Terminal feature.
+
+### OpenTelemetry Tracing Integration
+
+The new feature allows emitting richer telemetry data that might make identifying performance bottlenecks easier. The new feature is available for argocd-server
+and argocd-repo-server components and can be enabled using the --otlp-address flag.
+
+### Power PC and IBM Z Support
+
+The list of supported architectures has been expanded, and now includes IBM Z (s390x) and PowerPC (ppc64le). Starting with the v2.4 release the official quay.io
+repository is going to have images for amd64, arm64, ppc64le, and s390x architectures.
+
+### Other Notable Changes
+
+Overall v2.4 release includes more than 300 hundred commits from nearly 90 contributors. Here is a short sample of the contributions:
+
+* Enforce the deployment to remote clusters only
+* Native support of GCP authentication for GKE
+* Secured Redis connection
+* ApplicationSet Gitea support
+
+
+## v2.3.3 (2022-03-29)
+
+- fix: prevent excessive repo-server disk usage for large repos (#8845) (#8897)
+- fix: Set QPS and burst rate for resource ops client (#8915)
+
+## v2.3.2 (2022-03-22)
+
+- fix: application resource APIs must enforce project restrictions
+
+## v2.3.1 (2022-03-10)
+
+- fix: Retry checkbox unchecked unexpectedly; Sync up with YAML (#8682) (#8720)
+- chore: Bump stable version of application set addon (#8744)
+- fix: correct jsonnet paths resolution (#8721)
+- fix(ui): Applications page incorrectly resets to tiles view. Fixes #8702 (#8718)
+
+## v2.3.0 (2022-03-05)
 
 ### Argo CD ApplicationSet and Notifications are now part of Argo CD
 

docs/operator-manual/upgrading/2.3-2.4.md

@@ -1,5 +1,16 @@
 # v2.3 to 2.4
 
+## KSonnet support is removed
+
+The [https://ksonnet.io/] had been deprecated in [2019](https://github.com/ksonnet/ksonnet/pull/914/files) and no longer maintained.
+The time has come to remove it from the ArgoCD.
+
+## Helm 2 support is removed
+
+Helm 2 is not been officially supported since [Nov 2020](https://helm.sh/blog/helm-2-becomes-unsupported/). In order to ensure a smooth transition
+Helm 2 support was preserved in the Argo CD. We feel that Helm 3 is stable and it is time to drop Helm 2 support.
+
+
 ## Configure RBAC to account for new `exec` resource
 
 2.4 introduces a new `exec` [RBAC resource](https://argo-cd.readthedocs.io/en/stable/operator-manual/rbac/#rbac-resources-and-actions).

mkdocs.yml

@@ -97,6 +97,7 @@ nav:
     - operator-manual/server-commands/additional-configuration-method.md
   - Upgrading:
     - operator-manual/upgrading/overview.md
+    - operator-manual/upgrading/2.3-2.4.md
     - operator-manual/upgrading/2.2-2.3.md
     - operator-manual/upgrading/2.1-2.2.md
     - operator-manual/upgrading/2.0-2.1.md