Update opam

Author: yilinwei

packages/xcursor/xcursor.0.1.0/opam

@@ -1,5 +1,5 @@
 opam-version: "2.0"
-synopsis: "A pure implementation of Xcursor in Ocaml"
+synopsis: "A pure implementation of Xcursor in OCaml"
 description: """
 Xcursor is a de-facto standard for using cursors on Linux systems from Freedesktop. It defines a set
  of standard paths to search, a file format and a configuration format for users to customise cursors for desktop