fix:error when adding the ollama embedding model (langgenius#8236)

Co-authored-by: crazywoola <[email protected]>

api/core/model_runtime/model_providers/ollama/text_embedding/text_embedding.py

@@ -77,15 +77,10 @@ def _invoke(
                 inputs.append(text)
 
         # Prepare the payload for the request
-        payload = {
-            "input": inputs,
-            "model": model,
-        }
+        payload = {"input": inputs, "model": model, "options": {"use_mmap": "true"}}
 
-        # Make the request to the OpenAI API
-        response = requests.post(
-            endpoint_url, headers=headers, data=json.dumps(payload), timeout=(10, 300), options={"use_mmap": "true"}
-        )
+        # Make the request to the Ollama API
+        response = requests.post(endpoint_url, headers=headers, data=json.dumps(payload), timeout=(10, 300))
 
         response.raise_for_status()  # Raise an exception for HTTP errors
         response_data = response.json()