gnu: tumbler: Update to 4.18.1.

* gnu/packages/xfce.scm (tumbler): Update to 4.18.1.

gnu/packages/xfce.scm

@@ -357,7 +357,7 @@ merging features essential for loading menus modified with menu editors.")
 (define-public tumbler
   (package
     (name "tumbler")
-    (version "4.18.0")
+    (version "4.18.1")
     (source (origin
               (method url-fetch)
               (uri (string-append "https://archive.xfce.org/src/xfce/"
@@ -365,7 +365,7 @@ merging features essential for loading menus modified with menu editors.")
                                   "tumbler-" version ".tar.bz2"))
               (sha256
                (base32
-                "006gvwa7jqkky2qvl2yngbd4yzp63wpilhhmyg9p24pk9spz71s0"))))
+                "1833qnfw2c9wv7iw5cad5x5scj1rsqmmbwfld33zxx8akhd9hqgz"))))
     (build-system gnu-build-system)
     (native-inputs
      (list pkg-config intltool