fix: fix model name in g4f textgen

gen_service/main.py

@@ -94,7 +94,7 @@ def _gen_text(prompt, use_zukijourney=False):
         client = get_g4f_client()
         response = client.chat.completions.create(
                 provider=g4f.Provider.Llama,
-                model="llama-3-70b-instruct",
+                model="llama-3-70b",
                 messages=[{"role": "user", "content": prompt}],
                 max_tokens=800,
                 temperature=0.7,