Clarify HTTP Service Binding Needs Valid URL

[sabercoy]

Existing documentation URL(s)

https://developers.cloudflare.com/workers/runtime-apis/bindings/service-bindings/http/

What changes are you suggesting?

When calling a bound worker's fetch method, it is not clear and not mentioned what the URL should be. When thinking about it, the worker is bound, suggesting there should be no need for a URL.

I have run in to the same issue as these
https://community.cloudflare.com/t/service-binding-to-other-worker-not-working/559030
https://community.cloudflare.com/t/service-binding-pages-function-to-worker-cant-call-path/647192

The solution appears to be to add any valid URL with a hostname (it will be ignored anyway).
I am suggesting mentioning this in the docs, for the docs only give examples of passing through or cloning requests with internal, already-valid URLs

Additional information

No response