docs: update data-config.md

[sehilyi]

Fix https://github.com/sehilyi/goscan/pull/90#discussion_r1165982500

[dmaziec]

that looks good, example file names could be renamed to reflect the preferred extensions tsv/json.

Current documentation:

CNVs: Drivers:

[sehilyi]

Thanks! Let me update the files and their names on the docs