chore(codegen): bump smithy-ts commit to include 1.59.0 update

Author: trivikr

scripts/generate-clients/config.js

@@ -1,7 +1,7 @@
 // Update this commit when taking up new changes from smithy-typescript.
 module.exports = {
   // Use full commit hash as we explicitly fetch it.
-  SMITHY_TS_COMMIT: "c2a6b1b86ba92e467c517460fc84fe84ee72380b",
+  SMITHY_TS_COMMIT: "3b49f8732c92e10f511ed9877eb4a7c5147950e5",
 };
 
 if (module.exports.SMITHY_TS_COMMIT.length < 40) {