Improvements to the loop var content

[guardrex]

Description

Split it out from the Render Fragments section. Include an example for component params.

Page URL

https://learn.microsoft.com/en-us/aspnet/core/blazor/components/?view=aspnetcore-7.0#child-content-render-fragments

Content source URL

https://github.com/dotnet/AspNetCore.Docs/blob/main/aspnetcore/blazor/components/index.md

Document ID

31ad18df-1904-bbdd-cfed-8d0d0267c10e

Article author

@guardrex

[github-actions]

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