update antora config

diff --git a/doc/antora/main-site.yml.in b/doc/antora/main-site.yml.in
index 893a47d732023c660b268953f652953e19f7ceb8..ab3eef9d3717ded865dd7ab8458ce542448c1a46 100644 (file)
--- a/doc/antora/main-site.yml.in
+++ b/doc/antora/main-site.yml.in
@@ -21,6 +21,7 @@ content:
     branches:
 # latest v4 tree
       - HEAD
+      - release_4_0_alpha1
 # latest v3.0 dev branch HEAD
       - v3.0.x
 # latest v3.2 dev branch HEAD for upcoming release