refac: allow min_p for openai requests

backend/open_webui/utils/payload.py

@@ -57,6 +57,7 @@ def apply_model_params_to_body_openai(params: dict, form_data: dict) -> dict:
     mappings = {
         "temperature": float,
         "top_p": float,
+        "min_p": float,
         "max_tokens": int,
         "frequency_penalty": float,
         "presence_penalty": float,