Bump NuGet.Versioning from 6.8.0 to 6.9.1

Bumps [NuGet.Versioning](https://github.com/NuGet/NuGet.Client) from 6.8.0 to 6.9.1.
- [Release notes](https://github.com/NuGet/NuGet.Client/releases)
- [Commits](https://github.com/NuGet/NuGet.Client/commits)

---
updated-dependencies:
- dependency-name: NuGet.Versioning
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

src/Directory.Packages.props

@@ -45,7 +45,7 @@
     <PackageVersion Include="NServiceBus.Transport.AzureStorageQueues" Version="13.0.0" />
     <PackageVersion Include="NServiceBus.Transport.Msmq.Sources" Version="3.0.0" />
     <PackageVersion Include="NServiceBus.Transport.SqlServer" Version="8.0.0" />
-    <PackageVersion Include="NuGet.Versioning" Version="6.8.0" />
+    <PackageVersion Include="NuGet.Versioning" Version="6.9.1" />
     <PackageVersion Include="NUnit" Version="3.14.0" />
     <PackageVersion Include="NUnit3TestAdapter" Version="4.5.0" />
     <PackageVersion Include="Particular.Approvals" Version="1.0.0" />