Dependency (dependabot/nuget): Bump gong-wpf-dragdrop in /Source

Bumps [gong-wpf-dragdrop](https://github.com/punker76/gong-wpf-dragdrop) from 3.2.1 to 4.0.0.
- [Release notes](https://github.com/punker76/gong-wpf-dragdrop/releases)
- [Changelog](https://github.com/punker76/gong-wpf-dragdrop/blob/develop/GitReleaseManager.yaml)
- [Commits](punker76/gong-wpf-dragdrop@3.2.1...4.0.0)

---
updated-dependencies:
- dependency-name: gong-wpf-dragdrop
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

Source/NETworkManager/NETworkManager.csproj

@@ -62,7 +62,7 @@
         <PackageReference Include="AirspaceFixer" Version="1.0.6" />
         <PackageReference Include="AWSSDK.EC2" Version="3.7.422" />
         <PackageReference Include="DnsClient" Version="1.8.0" />
-        <PackageReference Include="gong-wpf-dragdrop" Version="3.2.1" />
+        <PackageReference Include="gong-wpf-dragdrop" Version="4.0.0" />
         <PackageReference Include="IPNetwork2" Version="3.0.667" />
         <PackageReference Include="Lextm.SharpSnmpLib" Version="12.5.5" />
         <PackageReference Include="LiveCharts.Wpf" Version="0.9.7" />