Update tabs/leaderboard.py

update note to include Google Vertex v. Google Gemini

tabs/leaderboard.py

@@ -120,7 +120,8 @@ def filter_leaderboard(df, model_type, category, sort_by):
     
     <div class="note-box">
         <p style="margin: 0; font-size: 1em;">
-            Note: API pricing for sorting by cost uses a 3-to-1 input/output ratio calculation. DeepSeek V3 and R1 were excluded from rankings due to limited function support. 
+            Note: API pricing for sorting by cost uses a 3-to-1 input/output ratio calculation. DeepSeek V3 and R1 were excluded from rankings due to limited function support.  Pricing for Gemini models shown reflects [Vertex AI](https://cloud.google.com/vertex-ai/generative-ai/pricing). Google AI Studio offers [Gemini API Access](https://ai.google.dev/gemini-api/docs/pricing) at a lower cost with an API Key.
+            
         </p>
     </div>