Move update guides up sidebar

[akeller]

Description

Connectors and Elasticsearch appear above the Camunda Platform 8 guides in the sidebar and I'm concerned that could create confusion. This moves those directories below the individual guide pages.

When should this change go live?

• This change is not yet live and should not be merged until {ADD_DATE} (apply hold label or convert to draft PR)?
• There is no urgency with this change.
• This change or page is part of a marketing blog, conference talk, or something else on a schedule.
• This functionality is already available but undocumented.
• This is a bug fix or security concern.

PR Checklist

• I have added changes to the relevant /versioned_docs directory, or they are not for an already released version.
• I have added changes to the main /docs directory (aka /next/), or they are not for future versions.
• My changes require an Engineering review, and I've assigned an engineering manager or tech lead as a reviewer, or my changes do not require an Engineering review.
• My changes require a technical writer review, and I've assigned @christinaausley as a reviewer, or my changes do not require a technical writer review.

[akeller]

FYI @bastiankoerber @sbuettner this move the Connectors update guides lower in the sidebar, but I think makes more sense visually.

[sbuettner]

@akeller Thanks!

Just had an idea or maybe hackathon project: Its sometimes tough to imagine how a change might look like without building it locally. The web-modeler team has a dedicated [deploy-preview] label that generates a deployment/build for a branch including a url to access it. Could be nice to have something similar if that is not something you already have and I am just not aware of. ✌️

[akeller]

@sbuettner yes! We have this in our backlog - https://github.com/camunda/developer-experience/issues/66

Inspired by @bastiankoerber after I asked him if he ever ran the docs locally to review PRs 😄