IDE idle session timeout (#6135)

## What are you changing in this pull request and why?

Add info about the IDE's idle session timeout to the user docs.

## Checklist
- [x] I have reviewed the [Content style
guide](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/content-style-guide.md)
so my content adheres to these guidelines.
- [x] The topic I'm writing about is for specific dbt version(s) and I
have versioned it according to the [version a whole
page](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/single-sourcing-content.md#adding-a-new-version)
and/or [version a block of
content](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/single-sourcing-content.md#versioning-blocks-of-content)
guidelines.
- [x] Needs review from product team

website/docs/docs/cloud/dbt-cloud-ide/develop-in-the-cloud.md

@@ -101,6 +101,7 @@ Nice job, you're ready to start developing and building models 🎉!
 ### Considerations
 - To improve your experience using dbt Cloud, we suggest that you turn off ad blockers. This is because some project file names, such as `google_adwords.sql`, might resemble ad traffic and trigger ad blockers.
 - To preserve performance, there's a file size limitation for repositories over 6 GB. If you have a repo over 6 GB, please contact [dbt Support](mailto:[email protected]) before running dbt Cloud.
+- The IDE's idle session timeout is one hour.
 - <Expandable alt_header="About the start up process and work retention">
 
   ### Start-up process