lib/trivial: update oldestSupportedRelease to 2505 (#421510)

Changed files
+1 -1
lib
+1 -1
lib/trivial.nix
···
*/
oldestSupportedRelease =
# Update on master only. Do not backport.
-
2411;
+
2505;
/**
Whether a feature is supported in all supported releases (at the time of