Upgrade humanizer model to Llama 3.3 70B

humanizer.py

@@ -90,7 +90,7 @@ Tone guidance: {readability_mod}
 Context: {purpose_mod}"""
 
     response = client.chat.completions.create(
-        model="llama-3.1-8b-instant",
+        model="llama-3.3-70b-versatile",
         messages=[
             {"role": "system", "content": system_prompt},
             {"role": "user", "content": text}