Fix 404 Error on image - prepend '/' to img URL

[tenzap]

Prevents 404 error on them when using the commit-snapshots

The items below are not applicable.

• At least two implementers are interested (and none opposed):
  • …
  • …
• Tests are written and can be reviewed and commented upon at:
  • …
• Implementation bugs are filed:
  • Chromium: …
  • Gecko: …
  • WebKit: …
  • Deno (only for timers, structured clone, base64 utils, channel messaging, module resolution, web workers, and web storage): …
  • Node.js (only for timers, structured clone, base64 utils, channel messaging, and module resolution): …
• Corresponding HTML AAM & ARIA in HTML issues & PRs:
• MDN issue is filed: …
• The top of this comment includes a clear commit message to use.

(See WHATWG Working Mode: Changes for more details.)

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/canvas.html ( diff )

[annevk]

Thanks! Could you please sign https://participate.whatwg.org/agreement?

[tenzap]

Is this really required for such a trivial change? Would you take the authorship of it instead ?