Bump Verify.Xunit from 28.9.0 to 31.3.0

---
updated-dependencies:
- dependency-name: Verify.Xunit
  dependency-version: 31.3.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

test/TimeZoneNames.Tests/TimeZoneNames.Tests.csproj

@@ -14,7 +14,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
-    <PackageReference Include="Verify.Xunit" Version="28.9.0" />
+    <PackageReference Include="Verify.Xunit" Version="31.3.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>