fix compile error

buildkite/bazelci.py

diff --git a/buildkite/bazelci.py b/buildkite/bazelci.py
index 17d3f5a..b61fdae 100644
--- a/buildkite/bazelci.py
+++ b/buildkite/bazelci.py
@@ -673,7 +673,7 @@
       break
 
     if try_publish_binary(platform, current_build_number, latest_generation):
-      print("Successfully published " + bazelci_builds_download_url(platform, current_build_number)
+      print("Successfully published " + bazelci_builds_download_url(platform, current_build_number))
       break
     attempt = attempt + 1