Bump Verify.NUnit from 31.19.1 to 31.20.0

---
updated-dependencies:
- dependency-name: Verify.NUnit
  dependency-version: 31.20.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src/Orc.ProjectManagement.Tests/Orc.ProjectManagement.Tests.csproj

@@ -24,7 +24,7 @@
     <PackageReference Include="NUnit" Version="4.6.1" PrivateAssets="all" />
     <PackageReference Include="NUnit3TestAdapter" Version="6.2.0" PrivateAssets="all" />
     <PackageReference Include="PublicApiGenerator" Version="11.5.4" PrivateAssets="all" />
-    <PackageReference Include="Verify.NUnit" Version="31.19.1" />
+    <PackageReference Include="Verify.NUnit" Version="31.20.0" />
   </ItemGroup>
 
   <ItemGroup>