Improve argMaxIf.md example numbers

Previously the example data did not give a great example of the argMaxIf functionality. The laptop would have been the returned product irregardless of the sales_count >= 10 condition. I believe my change makes the use of argMaxIf clearer, since the expensive watch is excluded by the condition.

Author: friedrich123456789

docs/guides/examples/aggregate_function_combinators/argMaxIf.md

@@ -36,7 +36,7 @@ INSERT INTO product_sales VALUES
     ('Laptop', 999.99, 10),
     ('Phone', 499.99, 15),
     ('Tablet', 299.99, 0),
-    ('Watch', 199.99, 5),
+    ('Watch', 1199.99, 5),
     ('Headphones', 79.99, 20);
 
 SELECT argMaxIf(product_name, price, sales_count >= 10) AS most_expensive_popular_product