smithy codegen version bump (#1161)

Author: 0marperez

gradle/libs.versions.toml

@@ -8,7 +8,7 @@ atomicfu-version = "0.23.1"
 
 # smithy-kotlin codegen and runtime are versioned separately
 smithy-kotlin-runtime-version = "1.0.6"
-smithy-kotlin-codegen-version = "0.30.5"
+smithy-kotlin-codegen-version = "0.30.7"
 
 # codegen
 smithy-version = "1.41.1"