chore(codegen): update smithy-typescript commit

Author: Steven Yuan

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: "ceb489edaf584300d0ac37c72c1a55a9a34cbd8d",
+  SMITHY_TS_COMMIT: "74d1aa5b97c09cb27f8ad70188d5cb02f329b25d",
 };
 
 if (module.exports.SMITHY_TS_COMMIT.length < 40) {