fix(stack/k8s): add log message

api/http/handler/stacks/stack_delete.go

@@ -250,6 +250,7 @@ func (handler *Handler) deleteStack(userID portainer.UserID, stack *portainer.St
 				if exists, err := filesystem.FileExists(manifest); err != nil || !exists {
 					// If removal has failed and one of the manifest files is missing,
 					// we can consider this stack as removed
+					log.Warn().Err(err).Msgf("failed to find manifest %s, but stack deletion will continue", manifest)
 					return nil
 				}
 			}