Update to OpenTelemetry.Instrumentation.AspNetCore v1.8.0

[DamianEdwards]

https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/Instrumentation.AspNetCore-1.8.0

FYI @samsp-msft

[davidfowl]

Done in #3351

[DamianEdwards]

@davidfowl Are you sure? This is the AspNetCore instrumentation package that was released a few days later.

[davidfowl]

Woops

[davidfowl]

NOTE: When you run this as a container, the URL will be wrong. It will print the internal listening IP:port instead of the exposed host and port.