Merge pull request #1325 from microsoft/dependabot/nuget/Verify.Xunit-21.0.0

Bump Verify.Xunit from 20.8.2 to 21.0.0

Author: andrueastman

test/Microsoft.OpenApi.Tests/Microsoft.OpenApi.Tests.csproj

@@ -28,7 +28,7 @@
     <PackageReference Include="Moq" Version="4.20.69" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="SharpYaml" Version="2.1.0" />
-    <PackageReference Include="Verify.Xunit" Version="20.8.2" />
+    <PackageReference Include="Verify.Xunit" Version="21.0.0" />
     <PackageReference Include="xunit" Version="2.5.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.0">
       <PrivateAssets>all</PrivateAssets>