readme: format copyright
@@ -3,8 +3,9 @@ libre README
libre is a Generic library for real-time communications with async IO support.
-Copyright (C) 2010 - 2020 Creytiv.com
-Copyright (C) 2021 Baresip Foundation (https://github.com/baresip)
+
+- Copyright (C) 2010 - 2020 Creytiv.com
+- Copyright (C) 2021 Baresip Foundation (https://github.com/baresip)
![Build](https://github.com/baresip/re/workflows/Build/badge.svg)
![ccheck](https://github.com/baresip/re/workflows/ccheck/badge.svg)
