Add spec entry for aggregated feed endpoint
Add spec entry for aggregated feed endpoint

Change-Id: I2b5c65c2c4137635df68a30bd7210808d193023e

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