Bump xunit.v3.core from 4.0.0 to 4.0.1 (#501)

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Updated [xunit.v3.core](https://github.com/xunit/xunit) from 4.0.0 to
4.0.1.

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Directory.Packages.props

@@ -18,7 +18,7 @@
     <PackageVersion Include="MSTest.TestFramework" Version="4.4.0" />
     <PackageVersion Include="System.CommandLine.DragonFruit" Version="0.4.0-alpha.25320.106" />
     <!-- Reference-only packages for test framework namespace resolution in analyzer tests -->
-    <PackageVersion Include="xunit.v3.core" Version="4.0.0" />
+    <PackageVersion Include="xunit.v3.core" Version="4.0.1" />
     <PackageVersion Include="NUnit" Version="4.6.1" />
     <PackageVersion Include="TUnit.Core" Version="1.67.0" />
   </ItemGroup>