Bump Nerdbank.GitVersioning from 3.0.28 to 3.1.68

Bumps [Nerdbank.GitVersioning](https://github.com/dotnet/Nerdbank.GitVersioning) from 3.0.28 to 3.1.68.
- [Release notes](https://github.com/dotnet/Nerdbank.GitVersioning/releases)
- [Commits](dotnet/Nerdbank.GitVersioning@v3.0.28...v3.1.68)

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

Author: dependabot-preview[bot]

Zeroconf/Zeroconf.csproj

@@ -19,7 +19,7 @@
 
   <ItemGroup>
     <EmbeddedResource Include="Properties\Zeroconf.rd.xml" />
-    <PackageReference Include="Nerdbank.GitVersioning" Version="3.0.28" PrivateAssets="all" />
+    <PackageReference Include="Nerdbank.GitVersioning" Version="3.1.68" PrivateAssets="all" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="all" />
     <PackageReference Include="System.Reactive" Version="4.2.0" />
   </ItemGroup>