CI failures due to multiple artifacts with the same name are presents

[carlopi]

If a workflows has more than one _extension_distribution.yml (say on main and v1.1.3) they might both upload a similarly named artifact, and this causes conflicts.

Example of failure mode is like:
https://github.com/carlopi/duckdb_magic/actions/runs/12040897215

Solution should be changing the naming of the artifacts or handle conflicts.

Opening this for tracking.