Add dashboard refresh bind

uno/modules/ui/dashboard.org

@@ -33,6 +33,9 @@ Define UI dashboard package.
                                                  "banner.txt")))
     (initial-buffer-choice 'uno/ui/dashboard/get-buffer)
     :general
+    (uno-define
+      :keymaps 'dashboard-mode-map
+      "R" 'dashboard-refresh-buffer)
     (uno-leader-define
       "bh" '(dashboard-refresh-buffer :which-key "Dashboard"))
     :init