add TODO breadcrumb

Author: jeefy

pkg/upgrade/upgrade.go

@@ -111,6 +111,7 @@ func TriggerUpgrade(h *helper.H) (*configv1.ClusterVersion, error) {
 		upgradeVersionParsed := semver.MustParse(upgradeVersion)
 		installVersionParsed := semver.MustParse(installVersion)
 
+		// TODO: Address Major versions eventually when 5.x looms on the horizon.
 		if upgradeVersionParsed.Minor() > installVersionParsed.Minor() {
 			// Upgrade the channel
 			cVersion.Spec.Channel = fmt.Sprintf("fast-%d.%d", upgradeVersionParsed.Major(), upgradeVersionParsed.Minor())