explicit remote 'origin' in publish-site script

In the publish.site script I'm setting the 'origin' url to
be git@github.com:jasperblues/spring-objective-c.git so the
Bamboo plan will be able to publish the docs to github site.
Merge pull request #1 from pstefaniak/master

Hi Jasper, these are the lines that should be adjusted (I think). But I'm not sure - I edited them blindly.