[gnome-build-meta] sdk/glib.bst: Use the main branch instead of the master branch

[Michael Catanzaro <mcatanzaro src gnome org>]

commit e3de9eeeed333e18a0c84e0a13559a412bab1d24
Author: Philip Withnall <pwithnall endlessos org>
Date:   Mon Jun 7 14:48:33 2021 +0100

    sdk/glib.bst: Use the main branch instead of the master branch
    
    See https://gitlab.gnome.org/GNOME/glib/-/issues/2348
    
    Signed-off-by: Philip Withnall <pwithnall endlessos org>
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-build-meta/-/merge_requests/1167>

 elements/sdk/glib.bst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/elements/sdk/glib.bst b/elements/sdk/glib.bst
index 78fedd3f..2c149a37 100644
--- a/elements/sdk/glib.bst
+++ b/elements/sdk/glib.bst
@@ -3,7 +3,7 @@ kind: meson
 sources:
 - kind: git_tag
   url: gitlab_gnome_org:GNOME/glib.git
-  track: master
+  track: main
 
 build-depends:
 - sdk/gtk-doc.bst