fix(prompts): preserve falsy autocomplete initial values

[btea]

What does this PR do?

When the initial value of autocomplete is set to falsy, it doesn't take effect due to a logical issue in the condition.

Type of change

• Bug fix
• Feature
• Refactor (no behavior change)
• Documentation
• Performance improvement
• Tests
• Chore (dependencies, CI, tooling)

Checklist

• pnpm test passes (or targeted tests for my change)
• pnpm format has been run
• I have added/updated tests for my changes (if applicable)
• I have added a changeset

AI-generated code disclosure

• This PR includes AI-generated code

[changeset-bot]

🦋 Changeset detected

Latest commit: b9ca20f

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@clack/prompts	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[pkg-pr-new]

• @example/basic

• @example/changesets

  npm i https://pkg.pr.new/@clack/core@618
  

  npm i https://pkg.pr.new/@clack/prompts@618
  

commit: b9ca20f

[dreyfus92]

one small thing, could we drop "@clack/core": patch from the changeset? this only touches prompts, so it'd publish an empty core release. also there's a typo, "thefirst" should be "the first". otherwise lgtm.

[btea]

Thank you for reviewing. It has been updated.

[dreyfus92]

thank you @btea lgtm 😄, i'm gonna wait for a second look from @43081j 👀