Fix licenses

Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Signed-off-by: Vicent Marti <vmg@strn.cat>

Author: dbussink

go/unicode2/unicode.go

@@ -1,3 +1,7 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package unicode2
 
 import "unicode"

go/vt/vtgate/vindexes/unicode_hash_test.go

@@ -1,3 +1,19 @@
+/*
+Copyright 2023 The Vitess Authors.
+
+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.
+*/
+
 package vindexes
 
 import (