chore: remove the version-pinned for xunit and xunit.extensibility.core

Author: davidkallesen

src/Atc.Test/Atc.Test.csproj

@@ -20,7 +20,8 @@
     <PackageReference Include="NSubstitute" Version="5.3.0" />
     <PackageReference Include="System.Net.Http" Version="4.3.4" />
     <PackageReference Include="System.Text.RegularExpressions" Version="4.3.1" />
-    <PackageReference Include="xunit.extensibility.core" Version="[2.9.0]" /> <!-- xunit.extensibility.core is version-pinned because versions newer than 2.9.0 introduce bugs -->
+    <PackageReference Include="xunit" Version="2.9.0" /> <!-- xunit should not be upgraded since newer version than 2.9.0 introduce bugs for MemberAutoNSubstituteDataAttribute -->
+    <PackageReference Include="xunit.extensibility.core" Version="2.9.0" /> <!-- xunit.extensibility.core should not be upgraded since newer version than 2.9.0 introduce bugs for MemberAutoNSubstituteDataAttribute -->
     <PackageReference Include="System.Text.Json" Version="8.0.5" />
   </ItemGroup>