fix: review suggestion, shorten verbose comment

Author: uniyalabhishek

build/rofl/manifest.go

@@ -539,14 +539,7 @@ func upgradeArtifacts(upgrade []artifactUpgrade) bool {
 
 // upgradePossible checks if any explicitly configured artifact differs from the latest.
 //
-// This has intentionally different semantics than upgradeArtifacts:
-//   - upgradeArtifacts: empty existing + non-empty new -> WRITES the new value
-//   - upgradePossible:  empty existing + non-empty new -> returns FALSE
-//
-// Rationale: When a manifest field is empty, the build uses the latest defaults
-// from code (LatestBasicArtifacts/LatestContainerArtifacts). So an empty field
-// means the user is already getting the latest, no notification needed. We only
-// notify when explicit overrides exist and are outdated.
+// In contrast to upgradeArtifacts() empty existing fields will be assumed as up-to-date.
 func upgradePossible(check []artifactUpgrade) bool {
 	for _, artifact := range check {
 		if artifact.new == "" {