docs(common): Improve package source mapping info (#2896)

Author: dimodi

installation/nuget.md

@@ -140,7 +140,7 @@ You can [generate your Telerik NuGet API Key on telerik.com](https://www.telerik
 
 ## Package Source Mapping
 
-The `Telerik.UI.for.Blazor` NuGet package and most of its dependencies reside on `nuget.telerik.com`. On the other hand, the [Telerik icon packages](slug:common-features-icons) reside on `nuget.org`. The correct [package source mapping](https://learn.microsoft.com/en-us/nuget/consume-packages/package-source-mapping) configuration should be similar to:
+The `Telerik.UI.for.Blazor` NuGet package and most of its dependencies reside on `nuget.telerik.com`. On the other hand, the [Telerik icon packages](slug:common-features-icons) and the [`Telerik.Licensing` package](slug:installation-license-key) reside on `nuget.org`. The correct [package source mapping](https://learn.microsoft.com/en-us/nuget/consume-packages/package-source-mapping) configuration should be similar to the one below.
 
 > Make sure that the `key` values in the `packageSourceMapping` section match the `key` values in the `packageSources` section, otherwise you will get a "Package not found" error.