Fix Update Function Configuration not working if using Image Lambda (#2720)

Author: abrooksv

.changes/next-release/bugfix-c3dd1429-f670-4567-b2c0-69dec0a3ac93.json

@@ -0,0 +1,4 @@
+{
+  "type" : "bugfix",
+  "description" : "Fix being unable to update Lambda configuration if the Image packaging type"
+}

jetbrains-core/src/software/aws/toolkits/jetbrains/services/lambda/upload/UpdateFunctionConfigDialog.kt

@@ -114,7 +114,7 @@ class UpdateFunctionConfigDialog(private val project: Project, private val initi
         name = initialSettings.name,
         description = view.description.text,
         packageType = view.configSettings.packageType(),
-        runtime = view.configSettings.runtime.selectedItem as Runtime,
+        runtime = if (view.configSettings.packageType() == PackageType.ZIP) view.configSettings.runtime.selectedItem as Runtime else null,
         handler = view.configSettings.handlerPanel.handler.text,
         iamRole = view.configSettings.iamRole.selected()!!,
         envVars = view.configSettings.envVars.envVars,