build(deps): bump Verify.Xunit from 21.1.5 to 21.3.0 in /src (#338)

Bumps [Verify.Xunit](https://github.com/VerifyTests/Verify) from 21.1.5 to 21.3.0.
- [Release notes](https://github.com/VerifyTests/Verify/releases)
- [Commits](VerifyTests/Verify@21.1.5...21.3.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

src/Directory.build.props

@@ -36,7 +36,7 @@
 		<PackageReference Include="xunit.runner.console" Version="2.5.1" />
 		<PackageReference Include="xunit.runner.visualstudio" Version="2.5.1" />
 		<PackageReference Include="Xunit.StaFact" Version="1.1.11" />
-		<PackageReference Include="Verify.Xunit" Version="21.1.5" />
+		<PackageReference Include="Verify.Xunit" Version="21.3.0" />
 		<PackageReference Include="FluentAssertions" Version="6.12.0" />
 		<PackageReference Include="PublicApiGenerator" Version="11.0.0" />
 		<PackageReference Include="coverlet.msbuild" Version="6.0.0" PrivateAssets="All" />