Updates ckandumper: 3719637 Limit rate per download

diff --git a/ckandumper b/ckandumper
index 50dc0f51d5e8c39a444c55c4a2dc244a3672b030..3719637cf414560b078f23a059ec4de4da7e7fd8 160000 (submodule)
--- a/ckandumper
+++ b/ckandumper
@@ -1 +1 @@
-Subproject commit 50dc0f51d5e8c39a444c55c4a2dc244a3672b030
+Subproject commit 3719637cf414560b078f23a059ec4de4da7e7fd8