Offload: Add stable redirects to offload idle behaviour docs (#24760)

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## Description

Adds stable links for explaining the Docker Offload idle behaviours. 

## Related issues or tickets

DCL-1717

## Reviews

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- [ ] Technical review
- [ ] Editorial review
- [ ] Product review

Author: leocross

data/redirects.yml

@@ -257,6 +257,9 @@
 "/offload/about/":
   # Onboarding - enable GPU
   - /go/docker-cloud-gpu/
+"/offload/about/#session-management-and-idle-state":
+  - /go/offload-idle-inactivity/
+  - /go/offload-idle-long-session/
 "/ai/compose/models-and-compose/":
   # Onboarding - enable GPU - compose for agents
   - /go/compose-for-agents/