gnu: emacs-darkroom: Update to 0.3.

* gnu/packages/emacs-xyz.scm (emacs-darkroom): Update to 0.3.

gnu/packages/emacs-xyz.scm

@@ -15206,14 +15206,14 @@ It s customizable: it's easy to add or redefine what exactly consitutes a
 (define-public emacs-darkroom
   (package
     (name "emacs-darkroom")
-    (version "0.2")
-    (source (origin
-              (method url-fetch)
-              (uri (string-append "https://elpa.gnu.org/packages/darkroom-"
-                                  version ".el"))
-              (sha256
-               (base32
-                "1a528brhz4vckhp77n2c1phkyqdliykpj9kzk3f834f4rwnb5mp0"))))
+    (version "0.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://elpa.gnu.org/packages/"
+                           "darkroom-" version ".el"))
+       (sha256
+        (base32 "0l1xg5kqmjw22k78qnsln0ifx2dx74xxqj0qp8xxcpqvzzx0xh86"))))
     (build-system emacs-build-system)
     (home-page "https://elpa.gnu.org/packages/darkroom.html")
     (synopsis "Remove visual distractions and focus on writing")