Bump smithy-kotlin version

Author: lauzadis

gradle/libs.versions.toml

@@ -9,8 +9,8 @@ coroutines-version = "1.9.0"
 atomicfu-version = "0.24.0"
 
 # smithy-kotlin codegen and runtime are versioned separately
-smithy-kotlin-runtime-version = "1.3.14"
-smithy-kotlin-codegen-version = "0.33.14"
+smithy-kotlin-runtime-version = "1.3.15"
+smithy-kotlin-codegen-version = "0.33.15"
 
 # codegen
 smithy-version = "1.51.0"