runtime-v2: add 'name' attribute to script call in schema (#1248)

Author: benbroadaway

runtime/v2/model/src/main/java/com/walmartlabs/concord/runtime/v2/schema/ScriptCallMixIn.java

@@ -29,7 +29,7 @@
 import java.util.Map;
 
 @JsonTypeName("ScriptCall")
-public interface ScriptCallMixIn extends StepMixIn {
+public interface ScriptCallMixIn extends NamedStep {
 
     @JsonSchemaTitle("Script Call step")
     @JsonProperty(value = "script", required = true)