Fixing improperly closed <h1 /> tag on archive pages so they don't appear so broken.
Per <https://commons.wikimedia.org/wiki/Special:PermaLink/00000000000000000000000000000000000000000094044994#Victor_theme_on_the_Wikimedia_blog>; Feb 5, 2013.

Change-Id: Iad4e62e7e76d1746d4aa6740daa6918385e701c4