chore: bump snapshot version to 1.2.9-SNAPSHOT

Author: aws-sdk-kotlin-ci

gradle.properties

@@ -13,7 +13,7 @@ kotlinx.atomicfu.enableNativeIrTransformation=false
 org.gradle.jvmargs=-Xmx2G -XX:MaxMetaspaceSize=1G
 
 # SDK
-sdkVersion=1.2.8
+sdkVersion=1.2.9-SNAPSHOT
 
 # codegen
-codegenVersion=0.32.8
+codegenVersion=0.32.9-SNAPSHOT