[vala/0.52] pango: Cherry-pick bindings fixes from 0.56

[Rico Tzschichholz <ricotz src gnome org>]

commit e322618f3fe5f141698772f30c2122b183d1cb76
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Mon Nov 29 11:28:06 2021 +0100

    pango: Cherry-pick bindings fixes from 0.56

 vapi/pango.vapi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/vapi/pango.vapi b/vapi/pango.vapi
index a9858192e..63dce8744 100644
--- a/vapi/pango.vapi
+++ b/vapi/pango.vapi
@@ -372,7 +372,7 @@ namespace Pango {
        public class FontsetSimple : Pango.Fontset {
                [CCode (has_construct_function = false)]
                public FontsetSimple (Pango.Language language);
-               public void append (Pango.Font font);
+               public void append (owned Pango.Font font);
                public int size ();
        }
        [CCode (cheader_filename = "pango/pango.h", copy_function = "g_boxed_copy", free_function = 
"g_boxed_free", type_id = "pango_glyph_item_get_type ()")]