Updated the groq models

pipeline.py

@@ -154,7 +154,7 @@ def compute_moderation_severity(mresult: ModerationResult) -> float:
 # -------------------------------------------------------
 GROQ_MODELS = {
     "default":        "llama3-70b-8192",
-    "classification": "mixtral-8x7b-32768",
+    "classification": "qwen-qwq-32b",
     "moderation":     "mistral-moderation-latest",
     "combination":    "llama-3.3-70b-versatile"
 }