fix 函数调用

Author: PlexPt

README.md

@@ -67,13 +67,13 @@ maven
 <dependency>
     <groupId>com.github.plexpt</groupId>
     <artifactId>chatgpt</artifactId>
-    <version>4.1.1</version>
+    <version>4.1.2</version>
 </dependency>
 ```
 
 gradle
 ```
-implementation group: 'com.github.plexpt', name: 'chatgpt', version: '4.1.1'
+implementation group: 'com.github.plexpt', name: 'chatgpt', version: '4.1.2'
 ```
 
 

pom.xml

@@ -5,7 +5,7 @@
 
     <groupId>com.github.plexpt</groupId>
     <artifactId>chatgpt</artifactId>
-    <version>4.1.1</version>
+    <version>4.1.2</version>
     <name>chatgpt</name>
     <description>ChatGPT4.0、 ChatGPT Java SDK.</description>
     <url>https://chat.plexpt.com</url>

src/main/java/com/plexpt/chatgpt/entity/chat/ChatCompletion.java

@@ -53,8 +53,10 @@ public class ChatCompletion implements Serializable {
     private double topP = 0.9;
 
 
-    @Builder.Default
-    String function_call = "auto";
+    /**
+     * auto
+     */
+    String function_call;
 
     List<ChatFunction> functions;