commitizen produces empty commit message after answering prompts

### Description

We set up `cz` as a husky pre-commit hook but when we go through the prompts via `git commit` it produces an empty commit message in `vim`.

These commands were executed to set it up:

```
npm install --save-dev commitizen
npx commitizen init cz-conventional-changelog --save-dev --save-exact
npx husky-init && npm install
```

Our `.husky/prepare-commit-msg`:

```
#!/usr/bin/env sh
. "$(dirname -- "$0")/_/husky.sh"

echo '[husky] Running commitizen for prepare-commit-msg hook...'
exec < /dev/tty && npx cz --hook || true
```

### Steps to reproduce

1. Execute `git commit`.
2. Answer the cz prompts.
3. A vim editor is opened.

### Current behavior

The vim editor has an empty commit message and commitizen errors out due to an empty commit message.

### Desired behavior

commitizen produces a commit message using information entered in prompts.

### Screenshots

```
git commit
[husky] Running commitizen for prepare-commit-msg hook...
cz-cli@4.3.0, cz-customizable@7.0.0

All lines except first will be wrapped after 100 characters.
? Select the type of change that you're committing: chore: Changes that don't modify src or test files
?
Denote the SCOPE of this change (optional): empty
? Write a SHORT, IMPERATIVE description of the change:
cz message prompt tweak
? Provide a LONGER description of the change (optional). Use "|" to break new line:
false
? List any ISSUES CLOSED by this change (optional). E.g.: #31, #34:

str.match is not a function
Aborting commit due to empty commit message.
```


### Environment

cz-cli@4.3.0
cz-customizable@7.0.0

Start with the .husky/prepare-commit-msg hook and reproduce the issue by running git commit, answering the commitizen prompts, and observing the Vim editor and str.match error. Trace how the prompted values are passed into the commit message; done means the entered prompt data produces a non-empty commit message without the error.

Scritto dal modello di indicizzazione a partire dal testo della issue.