fix: Apply openai 1.x.x

Author: comeevery-git

.github/workflows/code-review.yml

@@ -45,8 +45,7 @@ jobs:
         with open('pr_diff.txt', 'r') as file:
             diff_content = file.read()
 
-        # GPT 모델 호출
-        response = openai.ChatCompletion.create(
+        response = openai.chat.completions.create(
             model=model_name,
             messages=[
                 {"role": "system", "content": system_prompt},