Update index.md

[Rick-Anderson]

Fixes #30281

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aspnetcore/fundamentals/logging/index.md	Logging in .NET Core and ASP.NET Core

[Rick-Anderson]

@cijothomas what about moving it to the very bottom of the file under it's own H2? Doesn't the comment still apply?

If not, happy to remove the note.

[cijothomas]

I'd suggest removing it now.

(once we decide to show how to do the logging even before DI/host is ready, then we need to show LoggerFactory.Create to create a alternate pipeline. When we add that, this Note can be brought back.)

[Rick-Anderson]

Moved to #30288