Update verify to 31.20.0

Author: renovate[bot]

Directory.Packages.props

@@ -55,8 +55,8 @@
         <PackageVersion Include="NSubstitute" Version="5.3.0" />
         <PackageVersion Include="Verify.FakeItEasy" Version="2.1.0" />
         <PackageVersion Include="Verify.NSubstitute" Version="2.1.0" />
-        <PackageVersion Include="Verify.TUnit" Version="31.18.0" />
-        <PackageVersion Include="Verify.XUnitV3" Version="31.18.0" />
+        <PackageVersion Include="Verify.TUnit" Version="31.20.0" />
+        <PackageVersion Include="Verify.XUnitV3" Version="31.20.0" />
         <PackageVersion Include="Verify.SourceGenerators" Version="2.5.0" />
         <PackageVersion Include="xunit.v3" Version="3.2.2" />
         <PackageVersion Include="xunit.v3.extensibility.core" Version="3.2.2" />