update copyright information

Author: jingwood

src/Directory.Build.props

@@ -28,10 +28,10 @@
   <PropertyGroup>
     <Version>1.4</Version>
     <Authors>Jingwood</Authors>
-    <Company>unvell.com</Company>
+    <Company>unvell inc.</Company>
     <Product>D2DLib</Product>
     <Description>A .NET library for hardware-accelerated, high performance, immediate mode rendering via Direct2D.</Description>
-    <Copyright>Copyright © 2009-2022 unvell.com, Jingwood. All rights reserved.</Copyright>
+    <Copyright>Copyright © 2009-2022 unvell inc., Jingwood. All rights reserved.</Copyright>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <DeterministicSourcePaths>true</DeterministicSourcePaths>
     <DebugType>portable</DebugType>