Merge pull request icsharpcode#1222 from icsharpcode/net8

Build against net8 too

Author: GrahamTheCoder

CodeConv/CodeConv.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net10.0</TargetFramework>
+    <TargetFrameworks>net10.0;net8.0</TargetFrameworks>
     <AppendTargetFrameworkToOutputPath>true</AppendTargetFrameworkToOutputPath>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <IsPackable>true</IsPackable>