Extending voltha docs publish timeout

Change-Id: I57a033d0b20448943fd62395c7be379e3c0aab01
diff --git a/jjb/verify/voltha-docs.yaml b/jjb/verify/voltha-docs.yaml
index 904ff98..b2d3187 100644
--- a/jjb/verify/voltha-docs.yaml
+++ b/jjb/verify/voltha-docs.yaml
@@ -28,3 +28,4 @@
           build-output-path: '_build/multiversion/'
           sync-target-server: 'guide.opencord.org'
           sync-target-path: '/var/www/voltha-docs/'
+          build-timeout: 60