licenseURL is deprecated, use full text license

[dubnemo]

https://learn.microsoft.com/en-us/nuget/create-packages/package-authoring-best-practices#readme

ShippedItemInstancePlugin -> /home/dubnemo/ShippedItemInstancePlugin/ShippedItemInstancePlugin/bin/Release/net8.0/AgGateway.ADAPT.ShippedItemInstancePlugin.dll
/usr/lib/dotnet/sdk/8.0.114/Sdks/NuGet.Build.Tasks.Pack/buildCrossTargeting/NuGet.Build.Tasks.Pack.targets(221,5): warning NU5125: The 'licenseUrl' element will be deprecated. Consider using the 'license' element instead. [/home/dubnemo/ShippedItemInstancePlugin/ShippedItemInstancePlugin/ShippedItemInstancePlugin.csproj]

[dubnemo]

Simply using license element with the existing URL text value does NOT work. Nuget is parsing the text, and sees this is a URL.

/usr/lib/dotnet/sdk/8.0.114/Sdks/NuGet.Build.Tasks.Pack/buildCrossTargeting/NuGet.Build.Tasks.Pack.targets(221,5): error : An error occured while trying to parse the value 'https://www.eclipse.org/legal/epl-v10.html' of property 'license' in the manifest file. [/home/dubnemo/ShippedItemInstancePlugin/ShippedItemInstancePlugin/ShippedItemInstancePlugin.csproj]
/usr/lib/dotnet/sdk/8.0.114/Sdks/NuGet.Build.Tasks.Pack/buildCrossTargeting/NuGet.Build.Tasks.Pack.targets(221,5): error : Object reference not set to an instance of an object. [/home/dubnemo/ShippedItemInstancePlugin/ShippedItemInstancePlugin/ShippedItemInstancePlugin.csproj]

[dubnemo]

This warning is still open from #26
Not able to resolve at this time.

@knelson-farmbeltnorth @strhea