Bump Verify.NUnit from 30.19.1 to 30.20.1 (#749)

---
updated-dependencies:
- dependency-name: Verify.NUnit
  dependency-version: 30.20.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

src/Directory.Packages.props

@@ -13,7 +13,7 @@
     <PackageVersion Include="ProjectDefaults" Version="1.0.161" />
     <PackageVersion Include="Verify" Version="30.20.1" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />
-    <PackageVersion Include="Verify.Nunit" Version="30.19.1" />
+    <PackageVersion Include="Verify.Nunit" Version="30.20.1" />
     <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.1.2" />
   </ItemGroup>
 </Project>