chore(codegen): update smithy-typescript commit

Author: Steven Yuan

scripts/generate-clients/config.js

@@ -1,5 +1,5 @@
 // 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: "7de91ee308862ad62ed95fe9222f239221fa5a90",
+  SMITHY_TS_COMMIT: "d1ff70d0d4fe18c3cb0198d6351312ed14932b46",
 };