Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  5de876bf081f88b90ec9e487c1c9b9c708f05e09

QA: Note "Opening a topic" scenario fails in IE

This is the one test preventing IE from being green, see
<https://integration.wikimedia.org/ci/view/BrowserTests/job/browsertests
-Flow-en.wikipedia.beta.wmflabs.org-windows_8-internet_explorer-sauce/>

Change-Id: I712f9c07c82c9b27a8fe4662f99da54f1767e622