Bump cargo-dinghy to 0.6.4

Author: chitoyuu

.github/workflows/full-ci.yml

@@ -29,7 +29,7 @@ env:
   # Note: using variables is limited at the moment, see https://github.com/actions/runner/issues/480
   GDRUST_FEATURES: "gdnative/async,gdnative/serde,gdnative_bindings_generator/debug"
   CARGO_DENY_VERSION: "0.11.4"
-  CARGO_DINGHY_VERSION: "0.4.71"
+  CARGO_DINGHY_VERSION: "0.6.4"
   CARGO_MACHETE_VERSION: "0.3"
 
 on: