[TASK] Helm chart update guide: Update references to component upgrade articles

[theburi]

Related to

Epic: 2437

Overview

We should link the section of the Helm update guide to reference the Component update sections so we can provide context to customers related to the changes Helm automates.

Actions

Sub-tasks

• fix: iteration two of hc upgrade guide camunda-docs#6936
• docs(self-managed): update ingress and port-forward instructions camunda-docs#6935

[aabouzaid]

The docs have been updated ✅