chore: release 1.4.20

Author: aws-sdk-kotlin-ci

.changes/ba2b99b0-d583-472a-894a-9e56784eda75.json

@@ -1,5 +1,11 @@
 # Changelog
 
+## [1.4.20] - 06/20/2025
+
+### Fixes
+* Explicitly qualify shape member names in smoke tests and protocol tests
+* [#1295](https://github.com/smithy-lang/smithy-kotlin/issues/1295) Enable building this project on JDK21 by setting -Xjdk-release flag
+
 ## [1.4.19] - 06/19/2025
 
 ## [1.4.18] - 06/13/2025

.changes/bdcf7bc9-094c-4434-aa34-1df7f4f4c936.json

@@ -13,10 +13,10 @@ kotlinx.atomicfu.enableNativeIrTransformation=false
 org.gradle.jvmargs=-Xmx2G -XX:MaxMetaspaceSize=1G
 
 # SDK
-sdkVersion=1.4.20-SNAPSHOT
+sdkVersion=1.4.20
 
 # codegen
-codegenVersion=0.34.20-SNAPSHOT
+codegenVersion=0.34.20
 
 # FIXME Remove after Dokka 2.0 Gradle plugin is stable
 org.jetbrains.dokka.experimental.gradle.pluginMode=V2Enabled