[DOCS] Fix links to ingest content in the obs guide (#158984)

## Summary

Fixes title and URL used in link to the obs guide.

Fixes link error in
https://github.com/elastic/observability-docs/pull/2990

@elastic/kibana-docs I need someone to tell me what to do with the link
[here](https://github.com/elastic/kibana/blob/main/x-pack/plugins/observability_onboarding/public/components/app/custom_logs/wizard/configure_logs.tsx#L310).
Here's the relevant bit:


![image](5b1ba76c-dcb6-4ac9-83fa-0048991cf3b6)

I don't know where this UI appears in Kibana, but a user trying to find
info about adding YAML config options to their config is gonna be SOL
because the topic doesn't talk about that at all. What link should I use
instead?


### Checklist

Delete any items that are not applicable to this PR.

- [x] Any text added follows [EUI's writing
guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses
sentence case text and includes [i18n
support](https://github.com/elastic/kibana/blob/main/packages/kbn-i18n/README.md)

docs/getting-started/quick-start-guide.asciidoc

@@ -146,7 +146,7 @@ image::images/dashboard_sampleDataAddFilter_8.6.0.png[The [eCommerce] Revenue Da
 [[quick-start-whats-next]]
 == What's next?
 
-*Add your own data.* Ready to add your own data? Go to {observability-guide}/ingest-logs-metrics-uptime.html[Ingest logs, metrics, and uptime data with {agent}], or go to <<connect-to-elasticsearch,Add data to {kib}>> and learn about all the other ways you can add data.
+*Add your own data.* Ready to add your own data? Go to {observability-guide}/observability-get-started.html[Get started with Elastic Observability], or go to <<connect-to-elasticsearch,Add data to {kib}>> and learn about all the ways you can add data.
 
 *Explore your own data in Discover.* Ready to learn more about exploring your data in *Discover*? Go to <<discover, Discover>>.