fix: removing webModelerPostgresql from 8.5 upgrade guide

[hamza-m-masood]

Description

When should this change go live?

ASAP

• This is a bug fix, security concern, or something that needs urgent release support.
• This is already available but undocumented and should be released within a week.
• This on a specific schedule and the assignee will coordinate a release with the DevEx team. (apply hold label or convert to draft PR)
• This is part of a scheduled alpha or minor. (apply alpha or minor label)
• There is no urgency with this change and can be released at any time.

PR Checklist

• My changes are for an already released minor and are in /versioned_docs directory.
• My changes are for the next minor and are in /docs directory (aka /next/).

support: https://jira.camunda.com/browse/SUPPORT-24713

• My changes require an Engineering review, and I've assigned the Engineering DRI or delegate.
• My changes require a technical writer review, and I've assigned @camunda/tech-writers as a reviewer.

[akeller]

Just now seeing this, I will trigger a docs release.

However, does this need to be adjusted in any other version? 8.6?

[hamza-m-masood]

@akeller no, this change does not need to be included in 8.6 or other versions. Thanks for releasing.