remove/fix links to comply with respec

[johanneswilm]

---

Preview | Diff

[johanneswilm]

Hey @BoCupp-Microsoft ,
your last merge introduced a number of new links that are making Respec throw errors. This PR makes the errors go away, but there may be some other fixes that should be put in place instead, including:

• Export some terms from UIevents (such as compositionstart, compositionupdate, compositionend) and/or move the description of the event order during composition into UIevents entirely (? @garykac , @travisleithead ),
• Some new definitions may need to be written. Terms like "active text passage" and "composition session" might need to be added in another document. I couldn't find any links in the EditContext spec either. It doesn't seem like these terms should be defined in this specification.