Information missing, an url is missing where to hit to see the changes mentioned in the documentation.

### Type of issue

Missing information

### Description

After adding the code snippet to add the /NestedGreeting endpoint, we can't just hit the `localhost/NestedGreeting` endpoint to trigger it.
We need to hit the `/NestedGreeting??nestlevel=5` endpoint to see output shown in the image.

I'm talking about the part just before the image before this [section](https://learn.microsoft.com/en-us/dotnet/core/diagnostics/observability-with-otel#example-use-azure-monitor-and-application-insights)

At first I was confused, but after investigating the code I figured it out. I think we should add it so that someone new doesn't get stuck here.

### Page URL

https://learn.microsoft.com/en-us/dotnet/core/diagnostics/observability-with-otel

### Content source URL

https://github.com/dotnet/docs/blob/main/docs/core/diagnostics/observability-with-otel.md

### Document Version Independent Id

9db87c45-60ba-ce17-118c-f9bd15306ece

### Article author

@tommcdon

### Metadata

* ID: d6316286-f76d-24c0-831a-aabb4796e1f8
* Service: **dotnet-fundamentals**