[gtk/docs-gtk-org] Download artifacts from the correct branch

[Emmanuele Bassi <ebassi src gnome org>]

commit 200c5224c5a1a7f55d489ee9735dfa78225b4717
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Dec 14 18:54:07 2021 +0000

    Download artifacts from the correct branch
    
    GTK's main development branch is "main", now.

 download-reference.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/download-reference.sh b/download-reference.sh
index 534f75d2d2..42eba4b5ee 100755
--- a/download-reference.sh
+++ b/download-reference.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-REF="master"
+REF="main"
 
 curl -L --output "$REF-docs.zip" 
"https://gitlab.gnome.org/GNOME/gtk/-/jobs/artifacts/$REF/download?job=reference";
 unzip -d "$REF-docs" "$REF-docs.zip"