updating the copyright date on the legal notice

Author: kalexand-rh

welcome/legal-notice.adoc

@@ -5,7 +5,7 @@ include::_attributes/common-attributes.adoc[]
 :context: legal-notice
 
 [.lead]
-Copyright © 2022 Red Hat, Inc.
+Copyright © 2023 Red Hat, Inc.
 
 OpenShift documentation is licensed under the Apache License 2.0 (https://www.apache.org/licenses/LICENSE-2.0).