d/gbp.conf: Adjust to upstream-91.x

bcb56777 · Carsten Schoenert · 54c1a544 · bcb56777
Commit bcb56777 authored Oct 23, 2021 by Carsten Schoenert
--- a/debian/gbp.conf
+++ b/debian/gbp.conf
@@ -7,7 +7,7 @@ pristine-tar = True
 compression = xz
 debian-branch = debian/sid
 # default branch for upstream sources:
-upstream-branch = upstream-78.x
+upstream-branch = upstream-91.x
 components = [ 'thunderbird-l10n', ]

 [pq]