Upgrade duckdb version on new release on duckdb side

[sunank200]

Describe the bug Upgrade duckdb version on new release on duckdb side and add merge test for duckdb for test_merge.

More details on: https://github.com/duckdb/duckdb/issues/6087, https://github.com/duckdb/duckdb/issues/6087#issuecomment-1418239284

This should be fixed on the provider's side created the ticket for the same: https://github.com/astronomer/airflow-provider-duckdb/issues/5