gnu: lablgtk3: Update to 3.1.1.

* gnu/packages/ocaml.scm (lablgtk3): Update to 3.1.1.

gnu/packages/ocaml.scm

@@ -5824,7 +5824,7 @@ and SVG file output.")
 (define-public lablgtk3
   (package
     (name "lablgtk")
-    (version "3.0.beta8")
+    (version "3.1.1")
     (source (origin
               (method git-fetch)
               (uri (git-reference
@@ -5833,7 +5833,7 @@ and SVG file output.")
               (file-name (git-file-name name version))
               (sha256
                (base32
-                "08pgwnia240i2rw1rbgiahg673kwa7b6bvhsg3z4b47xr5sh9pvz"))))
+                "11qfc39cmwfwfpwmjh6wh98zwdv6p73bv8hqwcsss869vs1r7gmn"))))
     (build-system dune-build-system)
     (arguments
      `(#:tests? #t