update opam file

frama-clang.opam

@@ -30,7 +30,7 @@ build: [
   ["dune" "install" "-p" name "--create-install-files" name]
 ]
 name: "frama-clang"
-version: "0.0.15"
+version: "0.0.15+dev"
 synopsis: "Frama-C plug-in based on Clang for parsing C++ files"
 description: """
 This Frama-C plug-in parse C++ files that may content ACSL++ annotations.
@@ -40,5 +40,5 @@ authors: [
   "Virgile Prevosto"
 ]
 license: "LGPL-2.1-only"
-homepage: "https://frama-c.com/fc-plugins/frama-clang.html"
+homepage: "https://frama-c.com/frama-clang.html"
 bug-reports: "https://git.frama-c.com/pub/frama-clang"