Update README.md

Author: geraldb

README.md

@@ -51,7 +51,7 @@ and `site.url`:
 
 ```
 title:   'Jekyll Minimal Theme'
-url:     'http://planetjekyll.github.io/jekyll-minimal-theme'
+url:     'http://drjekyllthemes.github.io/jekyll-minimal-theme'
 author:
   name:  'Jekyll Minimal Theme Team'
 ```