[serverless] Updates DQ dashboard page

[benironside]

Serverless fix for #5900 — updates the Data Quality dashboard UI images and accompanying text to reflect the current interface

Preview: click the link in this comment then navigate to Security -> View serverless docs -> Dashboards -> Data quality dashboard

[github-actions]

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[mergify]

This pull request does not have a backport label. Could you fix it @benironside? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• v7.x is the label to automatically backport to the 7.x branch.
• v7./d./d is the label to automatically backport to the 7./d branch. /d is the digit

NOTE: backport-skip has been added to this pull request.

[elasticdocs]

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[kapral18]

LGTM