"footer-empty" rule does not recognize footer

I'm trying to use the `footer-empty` rule fined in the [documentation](https://commitlint.js.org/#/reference-rules?id=trailer-exists) but it seems to be erroneously flagging my footer as not present.

## Expected Behavior

This is my configuration:
```
const Configuration = {
/*
* Resolve and load @commitlint/config-conventional from node_modules.
* Referenced packages must be installed
*/
extends: ["@commitlint/config-conventional"],
/*
* Any rules defined here will override rules from @commitlint/config-conventional
*/
rules: {
"footer-empty": [2, "never"],
},
};

module.exports = Configuration;
```

As a result, I expected this commit to work:
```
chore: testing footer lint

footer: I expect this to work
# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
#
# On branch add_commit_linter
# Changes to be committed:
# modified: commitlint.config.js
#
```

## Current Behavior

Currently, I get this error when I commit the code:
```
commitlint...............................................................Failed
- hook id: commitlint
- duration: 0.39s
- exit code: 1

⧗ input: chore: testing footer lint

footer: I expect this to work
✖ footer may not be empty [footer-empty]
✖ found 1 problems, 0 warnings
(Need help? -> https://github.com/conventional-changelog/commitlint#what-is-commitlint )
```

## My Environment

| Executable | Version |
| ---------------------: | :------ |
| `commitlint --version` | `@commitlint/cli": "^16.2.1"` |
| `git --version` | `git version 2.32.0 (Apple Git-132)` |
| `node --version` | `Node.js v17.5.0` |