release-25.2: 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

@@ -36,10 +36,10 @@
   latest: 25.1.10
   predecessor: "24.3"
 "25.2":
-  latest: 25.2.6
+  latest: 25.2.7
   predecessor: "25.1"
 "25.3":
-  latest: 25.3.2
+  latest: 25.3.3
   predecessor: "25.2"
 "25.4":
   latest: 25.4.0-rc.1