feat: Update en default version to 28.2.1 (#45)

## What ❔

Update default EN version to 28.2.1

## Why ❔

Stable version upgrade

## Checklist

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- [x] PR title corresponds to the body of PR (we generate changelog
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- [ ] Documentation comments have been added / updated.

defaults/main.yml

@@ -11,7 +11,7 @@ docker_compose_version: "v2.23.0"
 # Versions of External Node and 3rd party components
 traefik_version: 2.11
 postgres_version: 14
-external_node_version: 27.2.0
+external_node_version: 28.2.1
 external_node_raw_docker_tag: ""
 vmagent_version: 1.100.1
 cadvisor_version: 0.47.2