Remove .NET 9 target from CodeGen.csproj to avoid ambiguity when calling dotnet run (i.e. avoid needing to specify --framework net8.0).

Author: andrewimcclement

CodeGen/CodeGen.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
+    <TargetFramework>net8.0</TargetFramework>
     <LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>
     <!-- Allow compile with various nullability warnings until fixed. -->