chore: update smithy-ts commit with 0.34.1 release

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: "3015d27bb80562baef9d1ce3171cbaad067e387a",
+  SMITHY_TS_COMMIT: "70766bb06f1b2c4cdccb4ce6bdbffc6f0c90f47e",
 };
 
 if (module.exports.SMITHY_TS_COMMIT.length < 40) {