chore(web-modeler): mention ci/cd blueprint

[wollefitz]

Description

Closes https://github.com/camunda/web-modeler/issues/8960
Closes https://github.com/camunda/web-modeler/issues/7836

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.

[wollefitz]

On hold: Depends on https://github.com/camunda/web-modeler/issues/8961 to be done first

[wollefitz]

@HanselIdes To not further delay this topic, I went forward without adding a visual preview as proposed in camunda/camunda-platform-tutorials#59 (review).

[HanselIdes]

LGTM - we could make further updates later as needed