Broken references in Web App Launch Handler API

[dontcallmedom-bot]

While crawling Web App Launch Handler API, the following links to other specifications were detected as pointing to non-existing anchors:

• [ ] https://wicg.github.io/manifest-incubations/index.html#launch-queue-and-launch-params
• [ ] https://www.w3.org/TR/appmanifest/#dfn-extension-point

_{This issue was detected and reported semi-automatically by Strudy based on data collected in webref.}