fix(lib): Typo

pkg/zeaburpack/ref.go

@@ -42,7 +42,7 @@ func newReferenceConstructor(proxyRegistry *string) referenceConstructor {
 func (rc *referenceConstructor) Construct(rawRefString string) string {
 	proxyRegistryPtr := rc.proxyRegistry
 
-	// If the proxy registry is not digestSet, we don't need to do anything.
+	// If the proxy registry is not set, we don't need to do anything.
 	if proxyRegistryPtr == nil || len(*proxyRegistryPtr) == 0 {
 		return rawRefString
 	}