[duckdb-labs bot] Bump DuckDB submodule (#297)

Bump duckdb submodule:
- Target branch: v1.5-variegata
- Date: 2026-02-06 10:43:06
- DuckDB SHA: 17127c3db49f94fe3250150c7087e1f925ccdad9
- Trigger:
https://github.com/duckdb/duckdb-python/actions/runs/21747036862

Author: evertlammerts