Typo in release.rst

Author: thodson-usgs

docs/release.rst

@@ -18,7 +18,6 @@ Enhancements
   By :user:`Tim Hodson <thodson-usgs>`.
 * Add PCodec
   By :user:`Ryan Abernathey <rabernat>`.
-=======
 * Use PyData theme for docs
   By :user:`John Kirkham <jakirkham>`, :issue:`485`.