[discourse-web] Move discourse to the stable branch now that 2.4.0 is out

[Andrea Veri <averi src gnome org>]

commit e1e22250a2edba4d6aa740fb8f6d291e6c72fbeb
Author: Andrea Veri <av gnome org>
Date:   Thu Feb 27 10:20:35 2020 +0000

    Move discourse to the stable branch now that 2.4.0 is out

 Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/Dockerfile b/Dockerfile
index 1c51334..338379b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -34,7 +34,7 @@ RUN apt update && \
 
 ### Set up Discourse ##################################
 #   - So we can overrride it with --build_arg
-ARG DISCOURSE_VERS='tests-passed'
+ARG DISCOURSE_VERS='stable'
 ENV DISCOURSE_RELEASE=$DISCOURSE_VERS RAILS_ENV=production RAILS_ROOT=/discourse HOME=/discourse
 
 RUN mkdir -p discourse && \