Docs for fetch() have dangling reference to Response class

## Description of the issue

The page https://adobexdplatform.com/plugin-docs/reference/uxp/function/fetch.html says `@see Response` for the return type, but it's not a clickable link.

## Proposed solution

Should we just link to https://developer.mozilla.org/en-US/docs/Web/API/Response from there?  Are there any significant differences from the web standard that we'd need to note?
