Updated mediawiki/extensions
Project: mediawiki/extensions/ContentTranslation  f794c384b21c77814f2c8c4847461cf8b5303135

Updated to the latest version of mediawiki_selenium Ruby gem.

Paired with Kartik Mistry. The new version is needed to run tests on
Sauce Labs.

Change-Id: Id5efccc25151529719ccef1c9c1de6f007fbd215