add missing copyright header for opentelemetry-instrumentation-redis (#3976)

* add missing copyright header for opentelemetry-instrumentation-redis

* add changelog entry

Author: pmeier

CHANGELOG.md

@@ -37,6 +37,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#3589](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3589))
 - opentelemetry-instrumentation: allow to skip all instrumentations loading with a wildcard
   ([#3967](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3967))
+- `opentelemetry-instrumentation-redis`: add missing copyright header for opentelemetry-instrumentation-redis
+  ([#3976](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3976))
 
 ### Fixed
 

instrumentation/opentelemetry-instrumentation-redis/src/opentelemetry/instrumentation/redis/custom_types.py

@@ -1,3 +1,17 @@
+# Copyright The OpenTelemetry 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.
+
 from __future__ import annotations
 
 from typing import Any, Callable, TypeVar