Update Bazelisk to 1.5.0

Change-Id: I4d6af2922711bc4d6b4d86e6daf14450b1409836
diff --git a/jenkins-docker/slave-bazel-nocache/Makefile b/jenkins-docker/slave-bazel-nocache/Makefile
index af9bac0..af3dbb0 100644
--- a/jenkins-docker/slave-bazel-nocache/Makefile
+++ b/jenkins-docker/slave-bazel-nocache/Makefile
@@ -4,7 +4,7 @@
 IMAGE=gerritforge/gerrit-ci-slave-bazel:debian-stretch-nocache
 BAZEL_VER=3.1.0
 BUILDIFIER_VER=3.2.1
-BAZELISK_VER=1.4.0
+BAZELISK_VER=1.5.0
 NODE_VER=10
 WCT_VER=6.8.0