improve LB description

app.py

@@ -505,8 +505,8 @@ with blocks:
         with gr.TabItem("Leaderboard", elem_id="formulaone-leaderboard-tab-table", id=2):
             gr.Markdown(
                 """
-                Welcome to the FormulaOne leaderboard. This table tracks the performance of various systems on the FormulaOne benchmark.
-                Use the "Select Columns to Display" dropdown to customize your view, and the search bar to find specific models or organizations.
+                Welcome to the FormulaOne leaderboard. This table tracks performance on the core FormulaOne benchmark, covering the **deeper** and **deepest** tiers (120 problems). 
+                Use the 'Select Columns to Display' dropdown to customize your view, and the search bar to find specific models or organizations.
                 """,
                 elem_classes="markdown-text",
             )