Update dependency NLog.Extensions.Logging to v6 (#220)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Boyd.NMEA.CLI/Boyd.NMEA.CLI.csproj

@@ -26,7 +26,7 @@
       <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="9.0.6" />
       <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="9.0.6" />
       <PackageReference Include="NLog" Version="6.0.0" />
-      <PackageReference Include="NLog.Extensions.Logging" Version="5.5.0" />
+      <PackageReference Include="NLog.Extensions.Logging" Version="6.0.0" />
       <PackageReference Include="System.IO.Ports" Version="9.0.6" />
     </ItemGroup>