chore: smithy update for smithyVersion=1.51.0

Author: kuhe

codegen/gradle.properties

@@ -1,2 +1,2 @@
-smithyVersion=1.50.0
+smithyVersion=1.51.0
 smithyGradleVersion=0.6.0

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: "5c4370ae7df25b219c1facb6203ead15b9334d12",
+  SMITHY_TS_COMMIT: "98d74245c48bc5cf0153112d1dbaa1fcde4139df",
 };
 
 if (module.exports.SMITHY_TS_COMMIT.length < 40) {