Update dependency xUnit.v3 to 2.0.3 (#780)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

test/Soenneker.Utils.AsyncSingleton.Tests/Soenneker.Utils.AsyncSingleton.Tests.csproj

@@ -17,7 +17,7 @@
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>
         <PackageReference Include="Soenneker.Tests.Unit" Version="3.0.840" />
-        <PackageReference Include="xUnit.v3" Version="2.0.2" />
+        <PackageReference Include="xUnit.v3" Version="2.0.3" />
     </ItemGroup>
 
     <ItemGroup>