Meta: update repository files

See https://github.com/whatwg/spec-factory for details.

Author: annevk

PULL_REQUEST_TEMPLATE.md

@@ -11,5 +11,6 @@ Thank you for contributing to the Fetch Standard! Please describe the change you
    * Chrome: …
    * Firefox: …
    * Safari: …
+   * Deno (not for CORS changes): …
 
 (See [WHATWG Working Mode: Changes](https://whatwg.org/working-mode#changes) for more details.)