Deploy prompts use the wrong name for the project config file

[mbostock]

Ref. https://github.com/observablehq/cli/pull/634/files#r1474901911

Also, can we make it shorter or add hard-wrapping so it looks pretty? Thank you.

[mbostock]

Also consider wrap-ansi and process.stdout.columns.

[mbostock]

Fixed in #669 (d95aacd#diff-56b601f2d15e50588c241aa410e2e33371e89501f907be2d3f9a377e11e3ed70).