chore: bump snapshot version to 0.8.4-SNAPSHOT

Author: aws-sdk-kotlin-ci

gradle.properties

@@ -5,7 +5,7 @@ kotlin.mpp.stability.nowarn=true
 org.gradle.jvmargs=-Xmx2G -XX:MaxMetaspaceSize=1G
 
 # aws-crt-kotlin
-sdkVersion=0.8.3
+sdkVersion=0.8.4-SNAPSHOT
 
 # publishing
 publishGroupName=aws.sdk.kotlin.crt