Merge pull request #1233 from shaarli/doc-fix-homepage-icon

doc: fix homepage icon

doc/md/index.md

@@ -1,4 +1,4 @@
-# <img src="../../assets/default/img/favicon.png" width="20px" height="20px"> Shaarli
+# <img src="images/icon.png" width="20px" height="20px"> Shaarli
 
 The personal, minimalist, super-fast, database free, bookmarking service.