Add Example tag and description to NetCore web integration example

[Jamesr51d]

The '@Example' tag and and relevant description should be included in the HomeController file for NetCore Web Integration example. This is currently preventing this example being included in documentation.

Here is the link to the appropriate file: https://github.com/51Degrees/pipeline-dotnet/blob/main/Web%20Integration/Examples/NetCore/Controllers/HomeController.cs

Here is an example of a file with example tag and description for reference: https://github.com/51Degrees/pipeline-dotnet/blob/main/Examples/ResultCaching/Program.cs