Update docs/sql/SQL-joins/cross-join.md

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

Author: Adez017

docs/sql/SQL-joins/cross-join.md

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 description: Learn about SQL CROSS JOIN, how it creates Cartesian products, syntax, examples, and when to use it for generating all possible combinations.
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-## 
+## What is CROSS JOIN?
 
 SQL **CROSS JOIN** produces the Cartesian product of two tables, returning all possible combinations of rows from both tables. Unlike other joins, CROSS JOIN doesn't require a join condition and combines every row from the first table with every row from the second table.