Bump stable version (#240)

Author: mikemanger

src/tmpl/index.pug

@@ -117,7 +117,7 @@ block content
             ul
               li Stable:
                 = ' '
-                a(href='https://www.npmjs.org/package/grunt') v1.4.1
+                a(href='https://www.npmjs.org/package/grunt') v1.6.1
                 span  (npm)
               li Development:
                 = ' '