update doc link

Author: Sudha247

lockfree.opam

@@ -2,7 +2,7 @@ opam-version: "2.0"
 maintainer: "KC Sivaramakrishnan <[email protected]>"
 authors: ["KC Sivaramakrishnan <[email protected]>"]
 homepage: "https://github.com/ocaml-multicore/lockfree"
-doc: "https://kayceesrk.github.io/lockfree/doc"
+doc: "https://ocaml-multicore.github.io/lockfree"
 synopsis: "Lock-free data structures for multicore OCaml"
 license: "ISC"
 dev-repo: "git+https://github.com/ocaml-multicore/lockfree.git"