fix(tests): fix required prop in test

Author: dtmeadows

openai-java-core/src/test/kotlin/com/openai/models/responses/StructuredResponseCreateParamsTest.kt

@@ -59,7 +59,7 @@ internal class StructuredResponseCreateParamsTest {
         private val METADATA = ResponseCreateParams.Metadata.builder().build()
         private val SERVICE_TIER = ResponseCreateParams.ServiceTier.AUTO
         private val REASONING = Reasoning.builder().build()
-        private val PROMPT = ResponsePrompt.builder().build()
+        private val PROMPT = ResponsePrompt.builder().id("test-prompt-id").build()
 
         private val TOOL_CHOICE_TYPE = ToolChoiceTypes.Type.FILE_SEARCH
         private val TOOL_CHOICE_TYPES = ToolChoiceTypes.builder().type(TOOL_CHOICE_TYPE).build()