add SPDX header

smdn · smdn · commit cb014f29baf1 · 2025-07-07T02:11:51.000+09:00
diff --git a/Smdn.Net.SkStackIP.slnx b/Smdn.Net.SkStackIP.slnx
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: 2025 smdn <smdn@smdn.jp>
+SPDX-License-Identifier: MIT
+-->
 <Solution>
   <Folder Name="/src/">
     <Project Path="src/Smdn.Devices.BP35XX/Smdn.Devices.BP35XX.csproj" />
