Fix output path on trellis-docs

Change-Id: If6311ebe45fd871099aae5cf2869faf893b8f5e2
diff --git a/jjb/repos/trellis-docs.yaml b/jjb/repos/trellis-docs.yaml
index f9e5851..9bd917c 100644
--- a/jjb/repos/trellis-docs.yaml
+++ b/jjb/repos/trellis-docs.yaml
@@ -27,6 +27,6 @@
       - 'sync-dir':
           dependency-jobs: 'version-tag_trellis-docs'
           build-command: 'make html'
-          build-output-path: 'build/html'
+          build-output-path: '_build/html/'
           sync-target-server: 'guide.opencord.org'
           sync-target-path: '/var/www/trellis-docs/'