Bump Verify.Xunit from 20.6.0 to 20.7.0 in /src (#965)

Bumps [Verify.Xunit](https://github.com/VerifyTests/Verify) from 20.6.0 to 20.7.0.
- [Release notes](https://github.com/VerifyTests/Verify/releases)
- [Commits](20.6.0...20.7.0)

---
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/NugetUsage/XunitNugetUsage/XunitNugetUsage.csproj

@@ -6,7 +6,7 @@
   <ItemGroup>
     <!-- begin-snippet: xunit-nugets -->
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.0" />
-    <PackageReference Include="Verify.Xunit" Version="20.6.0" />
+    <PackageReference Include="Verify.Xunit" Version="20.7.0" />
     <PackageReference Include="Xunit" Version="2.5.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.0" PrivateAssets="all" />
     <!-- end-snippet -->