[seahorse] data: Fix appdata screenshot

[Niels De Graef <nielsdg src gnome org>]

commit 446d9654251c090b60ccdf84dca4424bcc8b341e
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Mon May 23 20:22:23 2022 +0200

    data: Fix appdata screenshot
    
    Default branch was renamed.
    
    Thanks to bbhtt for finding this in the Flatpak MR
    (https://github.com/flathub/org.gnome.seahorse.Application/pull/11)

 data/org.gnome.seahorse.Application.appdata.xml.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/org.gnome.seahorse.Application.appdata.xml.in 
b/data/org.gnome.seahorse.Application.appdata.xml.in
index 2217d86b..5ad4abaf 100644
--- a/data/org.gnome.seahorse.Application.appdata.xml.in
+++ b/data/org.gnome.seahorse.Application.appdata.xml.in
@@ -18,7 +18,7 @@
 
   <screenshots>
     <screenshot type="default">
-      <image width="1024" 
height="576">https://gitlab.gnome.org/GNOME/seahorse/raw/master/data/screenshot-default.png</image>
+      <image width="1024" 
height="576">https://gitlab.gnome.org/GNOME/seahorse/raw/main/data/screenshot-default.png</image>
     </screenshot>
   </screenshots>