chore: update modeler screenshots to 5.14.0

[marstamm]

Description

Updates the screenshots to Camunda Modeler version 5.14.0, which will be released next week.

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]

Approving this so it's staged for the alpha release. Based on the footer, it looks like these are updated as expected - 5.13 -> 5.14.

However, the footer also shows "Camunda Platform 8.0", "Camunda Platform 8.1", or even Zeebe 1.3. Would be nice to have a future PR that rolls that to 8.2 and applies it consistently.