Upgrade rusoto

[Gang Liao]

error[E0308]: mismatched types
  --> src/driver/src/deploy/mod.rs:73:41
   |
73 |         let client = &LambdaClient::new(Region::default());
   |                                         ^^^^^^^^^^^^^^^^^ expected enum `rusoto_signature::region::Region`, found enum `Region`
   |
   = note: perhaps two different versions of crate `rusoto_signature` are being used?