update-contact /for ocaml-sfml

Update the Contact Link, for "ocaml-sfml",

Author: fccm2

packages/sfml/sfml.0.08.3/opam

@@ -1,5 +1,5 @@
 opam-version: "2.0"
-maintainer: "Florent Monnier <monnier.florent@gmail.com>"
+maintainer: "https://github.com/fccm"
 authors: [
   "Florent Monnier"
   "Sylvain Boilard"