Changed: main image link to https

Author: mallowlabs

index.html

@@ -8,7 +8,7 @@
   開発者集団です。
 
 stylesheets: ["styles/top.css"]
-footers: [ "Main image is licensed by <a href=\"http://www.flickr.com/photos/kathleencavalaro/4586018734/\">Kathleen Cavalaro</a> (CC BY 2.0)" ]
+footers: [ "Main image is licensed by <a href=\"https://www.flickr.com/photos/kathleencavalaro/4586018734/\">Kathleen Cavalaro</a> (CC BY 2.0)" ]
 
 keywords: [ "Ruby", "Software Engeering", "Redmine"]
 ---