Add a missing link

Author: BasThomas

_posts/2019-09-12-issue-143.md

@@ -108,7 +108,7 @@ against the oft-proposed "prefix operator" syntax.
 
 You can find the full proposal [here](https://github.com/gwynne/swift-evolution/blob/splat-proposal/proposals/NNNN-forward-array-to-variadic-args.md).
 
-[Owen Voorhees]() pitched [a proposal](https://forums.swift.org/t/pitch-extended-error-messages/28754)
+[Owen Voorhees](https://twitter.com/owenvoorhees) pitched [a proposal](https://forums.swift.org/t/pitch-extended-error-messages/28754)
 to extend the capabilities of error messages.
 
 > As a follow up from [Future of Diagnostics UX](https://forums.swift.org/t/future-of-diagnostics-ux/28178)