[gedit/gnome-3-34] snap: Ensure we pull the stable branch for gedit-plugins to match gedit

[Ken VanDine <kvandine src gnome org>]

commit a9c7f92daaf1566a24b0445e63f704dfb8d8efc5
Author: Ken VanDine <ken vandine canonical com>
Date:   Fri Nov 15 14:55:02 2019 -0800

    snap: Ensure we pull the stable branch for gedit-plugins to match gedit

 snap/snapcraft.yaml | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/snap/snapcraft.yaml b/snap/snapcraft.yaml
index 7a2022a4b..b143c3303 100644
--- a/snap/snapcraft.yaml
+++ b/snap/snapcraft.yaml
@@ -113,6 +113,7 @@ parts:
     after: [gedit]
     source: https://gitlab.gnome.org/GNOME/gedit-plugins.git
     source-type: git
+    source-branch: gnome-3-34
     plugin: meson
     meson-parameters:
       - --prefix=/snap/gedit/current/usr