Update cargo

diff --git a/src/tools/cargo b/src/tools/cargo
index cebef2951ee69617852844894164b54ed478a7da..d21c22870e58499d6c31f1bef3bf1255eb021666 160000 (submodule)
--- a/src/tools/cargo
+++ b/src/tools/cargo
@@ -1 +1 @@
-Subproject commit cebef2951ee69617852844894164b54ed478a7da
+Subproject commit d21c22870e58499d6c31f1bef3bf1255eb021666