Upgrade nuget NETCore 5.2.3 to 6.0.6

Author: angularsen

UnitsNet/UnitsNet.WindowsRuntimeComponent.csproj

@@ -109,7 +109,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.NETCore.UniversalWindowsPlatform">
-      <Version>5.2.3</Version>
+      <Version>6.0.6</Version>
     </PackageReference>
     <PackageReference Include="JetBrains.Annotations">
       <Version>10.4.0</Version>