hand edit mock license

for some reason hack/boilerplate.sh failed after using `addlicense`
so I copy/pasted the license header from another file

pkg/mocks/go-containerregistry/mock_v1/mocks.go

@@ -1,16 +1,18 @@
-// Copyright 2020 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+/*
+Copyright 2020 Google LLC
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
 
 // Code generated by MockGen. DO NOT EDIT.
 // Source: github.com/google/go-containerregistry/pkg/v1 (interfaces: Layer)
@@ -19,11 +21,12 @@
 package mock_v1
 
 import (
+	io "io"
+	reflect "reflect"
+
 	gomock "github.com/golang/mock/gomock"
 	v1 "github.com/google/go-containerregistry/pkg/v1"
 	types "github.com/google/go-containerregistry/pkg/v1/types"
-	io "io"
-	reflect "reflect"
 )
 
 // MockLayer is a mock of Layer interface