Broken hyperlink to showcase on front page

[DanielVandH]

On https://docs.sciml.ai/Overview/stable/, the hyperlink in the first point of the Reproducibility section is broken, showing

The documentation of the [SciML Showcase](@ref showcase) was built using these direct dependencies,

Not sure what the issue is, since https://github.com/SciML/SciMLDocs/blob/f5be870f44f744dbb429ea17dff67459d32c718c/docs/src/showcase/showcase.md?plain=1#L1 shows a valid matching @id and it's even correct in the Where to Start section on the same page. I'm guessing that wrapping it in ```@raw html prevents the syntax from working.

[ChrisRackauckas]

@ArnoStrouwen

[ArnoStrouwen]

Yes, the reference can't be in raw html. Some variation of the following might work. Will do a PR sometime next week if nobody got around to fixing it by then.