Update bazlets to latest revision on stable-2.14

Change-Id: I584450102289b86e422a10aa65d3e370f6421b1a
diff --git a/WORKSPACE b/WORKSPACE
index 5a3fca3..13d1b15 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "e57da7c1ddde1389c15c86154a2ac4019099b050",
+    commit = "21e71dc9abb42f5ac80c51d2df2a374c3414b9d2",
     #    local_path = "/home/<user>/projects/bazlets",
 )