QA: update Ruby gems for mediawiki-selenium
QA: update Ruby gems for mediawiki-selenium

This should get around the error with later Firefox versions

Change-Id: I879b39d2b1ee83f307c2efa2c82b5832eec38dc0

wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo