[w3c/manifest] Cite Image Resource (#895)

Closes #854

This change (choose one):

* [ ] Breaks existing normative behavior (please add label "breaking")
* [ ] Adds new normative requirements
* [ ] Adds new normative recommendations or optional items
* [x] Makes only editorial changes (only changes informative sections, or
  changes normative sections without changing behavior)
* [ ] Is a "chore" (metadata, formatting, fixing warnings, etc).

Commit message:

Cite the Image Resource spec.
You can view, comment on, or merge this pull request online at:

  https://github.com/w3c/manifest/pull/895

-- Commit Summary --

  * Editorial: cite Image Resource

-- File Changes --

    M index.html (308)

-- Patch Links --

https://github.com/w3c/manifest/pull/895.patch
https://github.com/w3c/manifest/pull/895.diff

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/w3c/manifest/pull/895