Update integration ui text referenced in the docs

[colleenmcginnis]

The UI text used in the Elasticsearch and Kibana integrations has changed. For example:

Older integration versions	Latest integration versions

We reference that text in the docs and should update the text:

• Self-managed: Elasticsearch / Collecting monitoring data with Elastic Agent
• Self-managed: Kibana / Collect monitoring data with Elastic Agent

Aside: @elastic/admin-docs are these pages your team should continue to own or should the ingest docs team own all the pages in the Self-managed: Elasticsearch and Self-managed: Kibana sections?

[github-actions]

🔍 Preview links for changed docs:

• deploy-manage/monitor/stack-monitoring/collecting-monitoring-data-with-elastic-agent.md
• deploy-manage/monitor/stack-monitoring/kibana-monitoring-elastic-agent.md

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[shainaraskas]

stack monitoring is a feature owned by Datastore > Data Management. If we're following that ownership structure strictly, it should still be on us. it would probably be more effective for you to own this because it uses ingest tech, but I'm hoping these pages don't need too much maintenance at this point

[colleenmcginnis]

Sounds good. I'll leave CODEOWNERS as it is now, but feel free to tag in @\elastic/ingest-docs if anything else comes up and you get tagged for review.