[iagno] Replace deprecated method.

[Arnaud B. <arnaudb src gnome org>]

commit 19c5bd4196f47a6eca589cd4ed20ba3dd09d4eaf
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Fri Feb 14 05:50:13 2020 +0100

    Replace deprecated method.

 src/base-window.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/base-window.vala b/src/base-window.vala
index 7181b42..ed8e891 100644
--- a/src/base-window.vala
+++ b/src/base-window.vala
@@ -361,7 +361,7 @@ private class BaseWindow : AdaptativeWindow, AdaptativeWidget
         bool success;
         try
         {
-            show_uri (_this.get_screen (), help_string_or_empty, get_current_event_time ());
+            show_uri_on_window (_this, help_string_or_empty, get_current_event_time ());
             success = true;
         }
         catch (Error e)