[gnome-sudoku] help: Update link to bug writing guidelines

[Andre Klapper <aklapper src gnome org>]

commit c9d1af90e0066327a0cc4e9acb5d3ae42916c478
Author: Andre Klapper <a9016009 gmx de>
Date:   Sun Mar 1 09:38:08 2020 +0100

    help: Update link to bug writing guidelines

 help/C/bug-filing.page | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/help/C/bug-filing.page b/help/C/bug-filing.page
index c4cec9d..e67ac2e 100644
--- a/help/C/bug-filing.page
+++ b/help/C/bug-filing.page
@@ -28,7 +28,7 @@
    </p>
 
   <p>Once you have an account, log in, and click on <gui>New issue</gui>.
-   Before reporting a bug, please read the <link 
href="https://bugzilla.gnome.org/page.cgi?id=bug-writing.html";>bug writing guidelines</link>,  and please 
<link href="https://gitlab.gnome.org/GNOME/gnome-sudoku/issues";>browse</link> for the bug to see if it 
already exists.
+   Before reporting a bug, please read the <link 
href="https://wiki.gnome.org/Community/GettingInTouch/BugReportingGuidelines";>bug writing guidelines</link>, 
and please <link href="https://gitlab.gnome.org/GNOME/gnome-sudoku/issues";>browse</link> for the bug to see 
if it already exists.
 </p>
 
    <p>