Missing named option instance

### Type of issue

Typo

### Description

What is the expected behavior if for retrieving named options if no options with the provided name has been registered.
I could either be the the default options instance or an exception.

This should be documented within the remarks section of the docs

### Page URL

https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.options.ioptionssnapshot-1.get?view=net-10.0-pp&source=docs

### Content source URL

https://github.com/dotnet/dotnet-api-docs-temp/blob/live/xml/Microsoft.Extensions.Options/IOptionsSnapshot`1.xml

### Document Version Independent Id

b0cbad50-0306-4f87-4b4f-f2905f02e834

### Platform Id

556d0fe2-d7cf-ed6d-19d4-1e3c88b01ff5

### Article author

@dotnet-bot