Bump Verify.Xunit from 19.5.0 to 19.6.0

Bumps [Verify.Xunit](https://github.com/VerifyTests/Verify) from 19.5.0 to 19.6.0.
- [Release notes](https://github.com/VerifyTests/Verify/releases)
- [Commits](VerifyTests/Verify@19.5.0...19.6.0)

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

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

Author: dependabot[bot]

tests/Serilog.Formatting.Log4Net.Tests.csproj

@@ -15,7 +15,7 @@
     <PackageReference Include="Serilog" Version="2.12.0" />
     <PackageReference Include="Serilog.Enrichers.Environment" Version="2.2.0" />
     <PackageReference Include="Serilog.Enrichers.Thread" Version="3.1.0" />
-    <PackageReference Include="Verify.Xunit" Version="19.5.0" />
+    <PackageReference Include="Verify.Xunit" Version="19.6.0" />
     <PackageReference Include="xunit" Version="2.4.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5" PrivateAssets="all" />
   </ItemGroup>