fix: stabilize software updates

internal/model/model.go

@@ -91,7 +91,7 @@ type PiHoleCredential struct {
 }
 
 // SoftwareUpdateSettings contains the locally persisted update state. The
-// encrypted registry token is returned only to trusted backend components and
+// encrypted registry credential is returned only to trusted backend components and
 // is never passed to templates.
 type SoftwareUpdateSettings struct {
 	RegistryUsername string