Bump chdig to 25.7.1.

Why it matters

The update to chdig version 25.7.1 ensures improved tool performance and alignment with the latest ClickHouse features, facilitating better diagnostics and debugging for users.

How to use it

Users can utilize the updated chdig tool by downloading or upgrading to version 25.7.1 from its official releases. This version integrates seamlessly with compatible ClickHouse versions to assist in diagnostic tasks.