Fix spanner-refdb plugin URL

Change-Id: Id33ecfbb2b4dc72e1585757d31df253eee1452ab

container-images/gerrit-base/Dockerfile

diff --git a/container-images/gerrit-base/Dockerfile b/container-images/gerrit-base/Dockerfile
index be6fa77..6eb2fc9 100644
--- a/container-images/gerrit-base/Dockerfile
+++ b/container-images/gerrit-base/Dockerfile
@@ -35,7 +35,7 @@
 RUN curl -f -k -o /var/plugins/high-availability.jar ${HA_JAR_URL}
 
 # Download spanner-refdb plugin
-ARG SPANNER_REFDB_URL=https://gerrit-ci.gerritforge.com/job/plugin-spanner-refdb-bazel-master-${GERRIT_BRANCH}/lastSuccessfulBuild/artifact/bazel-bin/plugins/spanner-refdb/spanner-refdb.jar
+ARG SPANNER_REFDB_URL=https://gerrit-ci.gerritforge.com/job/plugin-spanner-refdb-bazel-${GERRIT_BRANCH}/lastSuccessfulBuild/artifact/bazel-bin/plugins/spanner-refdb/spanner-refdb.jar
 RUN curl -f -k -o /var/plugins/spanner-refdb.jar ${SPANNER_REFDB_URL}
 
 # Download events-broker lib