Broken link in search results

[benmccann]

Search for store contract and click this result:

It will take you to https://svelte.dev/docs/svelte-components#script-store-contract

The real link should be https://svelte.dev/docs/svelte-components#script-4-prefix-stores-with-$-to-access-their-values-store-contract

Separately, I've been thinking that these URLs are ridiculously long and it'd be better to have it just be #store-contract when possible. We can make it longer if there's a need to deduplicate, but otherwise I think a shorter version would be nicer.