Bump Verify.Xunit from 19.11.2 to 19.12.0

Bumps [Verify.Xunit](https://github.com/VerifyTests/Verify) from 19.11.2 to 19.12.0.
- [Release notes](https://github.com/VerifyTests/Verify/releases)
- [Commits](VerifyTests/Verify@19.11.2...19.12.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

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

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFrameworks>net7.0</TargetFrameworks>
     <GeneratePackageOnBuild>false</GeneratePackageOnBuild>
@@ -28,7 +28,7 @@
     <PackageReference Include="Moq" Version="4.18.4" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="SharpYaml" Version="2.1.0" />
-    <PackageReference Include="Verify.Xunit" Version="19.11.2" />
+    <PackageReference Include="Verify.Xunit" Version="19.12.0" />
     <PackageReference Include="xunit" Version="2.4.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
       <PrivateAssets>all</PrivateAssets>