gnu: ocaml-sexplib: Update to 0.15.1.

* gnu/packages/ocaml.scm (ocaml-sexplib): Update to 0.15.1.

gnu/packages/ocaml.scm

@@ -5307,11 +5307,17 @@ parsexp_io.")
 (define-public ocaml-sexplib
   (package
     (name "ocaml-sexplib")
-    (version "0.15.0")
+    (version "0.15.1")
     (home-page "https://github.com/janestreet/sexplib")
-    (source
-     (janestreet-origin "sexplib" version
-                        "1xs55f11yhscnfrzpvy1vn05j6xi9kxy097465624l615j7k8qm5"))
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                     (url home-page)
+                     (commit (string-append "v" version))))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "1gcvcc0jw6pb69wwfjnaqz1jk5simap2kdb7g43v7v7mksg8sh9f"))))
     (build-system dune-build-system)
     (propagated-inputs
      (list ocaml-base ocaml-num ocaml-parsexp ocaml-sexplib0))