Update smithy-rs to release-2025-06-03 (#1302)

Updates the smithy-rs code generator and runtime dependencies to
release-2025-06-03

Author: ysaito1001

config.json

@@ -1,5 +1,5 @@
 {
   "dependencies": {
-    "smithyRsVersion": "release-2025-05-19"
+    "smithyRsVersion": "release-2025-06-03"
   }
 }