ci: add exe output type for aot unit tests project

Author: dmako

CommonNet.Extensions.Tests/CommonNet.Extensions.Tests.csproj

@@ -1,6 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
+    <OutputType>Exe</OutputType>
     <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">net8.0;net9.0;net48</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>