Bump the testing group with 2 updates

Bumps Microsoft.NET.Test.Sdk from 17.14.1 to 18.0.0
Bumps Verify.Xunit from 30.19.1 to 30.20.1

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-version: 18.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: testing
- dependency-name: Verify.Xunit
  dependency-version: 30.20.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: testing
...

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

Author: dependabot[bot]

test/Tests.csproj

@@ -20,9 +20,9 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
     <PackageReference Include="Shouldly" Version="4.3.0" />
-    <PackageReference Include="Verify.Xunit" Version="30.19.1" />
+    <PackageReference Include="Verify.Xunit" Version="30.20.1" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>