Add more specific link

issues/payment-handler-missingtask.md

@@ -6,7 +6,7 @@ Repo: 'https://github.com/w3c/payment-handler'
 
 While crawling [Payment Handler API](https://w3c.github.io/payment-handler/), the following algorithms fire an event, or resolve or reject a Promise, within a step that runs [in parallel](https://html.spec.whatwg.org/multipage/infrastructure.html#in-parallel) without first queuing a task:
 * [ ] The algorithm that starts with "Upon receiving a PaymentRequest by way of PaymentRequest.show() and subsequent user selection of a payment handler, the user agent MUST run the following steps:" resolves/rejects a promise directly in a step that runs in parallel
-* [ ] An algorithm resolves/rejects a promise directly in a step that runs in parallel
+* [ ] The [Open Window Algorithm](https://w3c.github.io/payment-handler/#open-window-algorithm) resolves/rejects a promise directly in a step that runs in parallel
 
 See [Dealing with the event loop](https://html.spec.whatwg.org/multipage/webappapis.html#event-loop-for-spec-authors) in the HTML specification for guidance on how to deal with algorithm sections that run *in parallel*.