[Workers] Service binding URL requirement

[ToriLindsay]

Fixes #18581

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PR Change Summary

Updated service binding documentation to require a valid URL for new requests.

• Added a note about providing a valid URL with a hostname for new requests.
• Included an example of creating a new request with a valid URL.

Modified Files

• src/content/docs/workers/runtime-apis/bindings/service-bindings/http.mdx

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[ToriLindsay]

@GregBrimble Would you mind checking this for accuracy and that it fixes #18581 ? I just took my best guess. Also, let me know if you think it needs more of an acknowledgement that (as I understand it) the URL is fairly arbitrary and will be ignored, but is needed anyway.

[github-actions]

Preview URL: https://c5f5dd1b.preview.developers.cloudflare.com
Preview Branch URL: https://tori-pcx-18581-service-binding-url-requirement.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/workers/runtime-apis/bindings/service-bindings/http/	https://tori-pcx-18581-service-binding-url-requirement.preview.developers.cloudflare.com/workers/runtime-apis/bindings/service-bindings/http/

[GregBrimble]

It's arbitrary, in the sense that a user can provide any URL at all. But it still matters as a legitimate value that the callee will receive and can act on if it chooses to.