[discovery] Correction on Structured Data on Commons project

Hello all, Yesterday, an announcement (Now live: Shared structured data), incorrectly stated that Structured Data had been launched on Commons. The feature which was inaccurately named “Structured Data”, enables users to add tabular data to the data namespace on Commons via the regular page editor and to further display and/or visualize that data from other wikis. This work is unrelated to an ongoing project called Structured Data on Commons. For more on the newly launched feature, see the Tabular Data [1] and Map Data [2] help pages on MediaWiki.org. For information on the Structured Data on Commons project, designed to associate structured data with media files on Commons to improve their discoverability, please visit the project page on Commons. [3] Thank you, -Katie [1] - https://www.mediawiki.org/wiki/Help:Tabular_Data [2] - https://www.mediawiki.org/wiki/Help:Map_Data [3] - https://commons.wikimedia.org/wiki/Commons:Structured_data