Fix double slashes in feed.xml.
Fix double slashes in feed.xml.

JoshTheGeek/joshuaoldenburg.com,JoshTheGeek/joshuaoldenburg.com,JoshOldenburg/joshuaoldenburg.com,JoshOldenburg/joshuaoldenburg.com,JoshTheGeek/joshuaoldenburg.com,JoshOldenburg/joshuaoldenburg.com