0.6.1

The description in the catalogue, which had gone stale.

No code changes: an installed 0.6.0 behaves exactly the same, and there is nothing
to gain by updating except the entry in the plugin list looking right.

The catalogue builds its entry from the manifest at the moment a release is
published, so the text there was still the one from 0.1.0 — and it advertised two
things that no longer exist: tidying up spacing, which was cut in 0.1.2, and
cleaning up transcripts, which went in 0.3.0. It also listed the providers without
Perplexity, which became a preset in 0.6.0.