fix(client): compilation error in adding streaming discriminator (#342)

Author: stainless-app[bot]

openai-java-core/src/main/kotlin/com/openai/services/async/audio/TranscriptionServiceAsyncImpl.kt

@@ -3,7 +3,7 @@
 package com.openai.services.async.audio
 
 import com.openai.core.ClientOptions
-import com.openai.core.JsonValue
+import com.openai.core.MultipartField
 import com.openai.core.RequestOptions
 import com.openai.core.handlers.errorHandler
 import com.openai.core.handlers.jsonHandler
@@ -109,11 +109,7 @@ class TranscriptionServiceAsyncImpl internal constructor(private val clientOptio
                     .body(
                         multipartFormData(
                             clientOptions.jsonMapper,
-                            params
-                                ._body()
-                                .toBuilder()
-                                .putAdditionalProperty("stream", JsonValue.from(true))
-                                .build(),
+                            params._body() + ("stream" to MultipartField.of(true)),
                         )
                     )
                     .build()

openai-java-core/src/main/kotlin/com/openai/services/blocking/audio/TranscriptionServiceImpl.kt

@@ -3,7 +3,7 @@
 package com.openai.services.blocking.audio
 
 import com.openai.core.ClientOptions
-import com.openai.core.JsonValue
+import com.openai.core.MultipartField
 import com.openai.core.RequestOptions
 import com.openai.core.handlers.errorHandler
 import com.openai.core.handlers.jsonHandler
@@ -96,11 +96,7 @@ class TranscriptionServiceImpl internal constructor(private val clientOptions: C
                     .body(
                         multipartFormData(
                             clientOptions.jsonMapper,
-                            params
-                                ._body()
-                                .toBuilder()
-                                .putAdditionalProperty("stream", JsonValue.from(true))
-                                .build(),
+                            params._body() + ("stream" to MultipartField.of(true)),
                         )
                     )
                     .build()