Update .kokoro

.kokoro

diff --git a/.kokoro b/.kokoro
index 88e4018..38587c9 100755
--- a/.kokoro
+++ b/.kokoro
@@ -53,7 +53,7 @@
 
 if [ -n "$KOKORO_BUILD_NUMBER" ]; then
   bazel version
-  use_bazel.sh 0.11.0
+  use_bazel.sh latest
   bazel version
 fi