Update RBAC diagram

[lzdanski]

Issue Type

Inaccurate, misleading, or out-of-date information

Links to Affected Docs

https://docs.astronomer.io/astro/astro-architecture#access-control-architecture

The Issue or Context

With new custom deployment roles, we need to update this diagram.

Fix or Proposed Change

No response

Additional Notes

Work with MK to document new features

Required Reviewers

No response