Updated mediawiki/extensions
Project: mediawiki/extensions/PageNotice  28e2076d6aadb8609bf76b93d4e4cfb49dbb4e1d

Add CSS file to provide a margin below/above each notice

Otherwise the notices crash into the page content, and into each other.

Change-Id: I0ad5c92fdcc4b312d2026a4f9cfe7ddb2aff67b2