Bump Verify.Xunit from 30.7.3 to 30.20.1

---
updated-dependencies:
- dependency-name: Verify.Xunit
  dependency-version: 30.20.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

test/BenchmarkDotNetVisualizer.Tests/BenchmarkDotNetVisualizer.Tests.csproj

@@ -13,7 +13,7 @@
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.4" PrivateAssets="All" />
     <PackageReference Include="Verify.DiffPlex" Version="3.1.2" />
-    <PackageReference Include="Verify.Xunit" Version="30.7.3" />
+    <PackageReference Include="Verify.Xunit" Version="30.20.1" />
   </ItemGroup>
 
   <ItemGroup>