Fix Portuguese news selector
Fix Portuguese news selector

The old version of the CSS selector for ptwiki news stories resulted in
too many news result (around 133 as of yesterday). Now it should only
pick from the top news table.

We had not noticed earlier since he had not updated the fixtures.
A subsequent commit will do so.

Change-Id: I165ec6056c10673a297ed407e427cc1697f1efc4

wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps