Docs: update CI artifacts expiry docs to include "keep latest artifacts" note

doc/ci/caching/index.md

@@ -37,9 +37,9 @@ can't link to files outside it.
 - Define artifacts per job.
 - Subsequent jobs in later stages of the same pipeline can use artifacts.
 - Different projects cannot share artifacts.
-
-Artifacts expire after 30 days unless you define an [expiration time](../yaml/index.md#artifactsexpire_in).
-Use [dependencies](../yaml/index.md#dependencies) to control which jobs fetch the artifacts.
+- Artifacts expire after 30 days by default. You can define a custom [expiration time](../yaml/index.md#artifactsexpire_in).
+- The latest artifacts do not expire if [keep latest artifacts](../pipelines/job_artifacts.md#keep-artifacts-from-most-recent-successful-jobs) is enabled.
+- Use [dependencies](../yaml/index.md#dependencies) to control which jobs fetch the artifacts.
 
 ## Good caching practices