release-24.3: Update pkg/testutils/release/cockroach_releases.yaml

Update pkg/testutils/release/cockroach_releases.yaml with recent values.

Epic: None
Release note: None
Release justification: test-only updates

Author: cockroach-teamcity

pkg/testutils/release/cockroach_releases.yaml

@@ -42,5 +42,5 @@
   latest: 25.3.5
   predecessor: "25.2"
 "25.4":
-  latest: 25.4.0
+  latest: 25.4.1
   predecessor: "25.3"