feat: fix an if

Author: VinciGit00

scrapegraphai/nodes/generate_answer_node.py

@@ -12,7 +12,7 @@
 from tqdm import tqdm
 
 from ..utils.logging import get_logger
-from ..models import Ollama, Groq
+from ..models import Ollama, Groq, OpenAI
 # Imports from the library
 from .base_node import BaseNode
 from ..helpers import template_chunks, template_no_chunks, template_merge, template_chunks_with_schema, template_no_chunks_with_schema
@@ -46,7 +46,7 @@ def __init__(
         super().__init__(node_name, "node", input, output, 2, node_config)
         self.llm_model = node_config["llm_model"]
 
-        if isinstance(node_config["llm_model"], Ollama):
+        if isinstance(node_config["llm_model"], Ollama) or isinstance(node_config["llm_model"], OpenAI):
             self.llm_model.format="json"
         self.verbose = (
             True if node_config is None else node_config.get("verbose", False)