### Summary

when running ansible-test over a collection, if there are errors or failures, it will link you to the correct documentation to help resolve the issue. this functionality is currently broken as it is linking to `docs.ansible.com/ansible/` instead of `docs.ansible.com/ansible-core/` which leads to 404s. 


### Issue Type

Bug Report

### Component Name

ansible-test

### Ansible Version

```console
$ ansible --version
ansible [core 2.11.2]
```


### Configuration

```console
$ ansible-config dump --only-changed
```


### OS / Environment

Fedora 34

### Steps to Reproduce

<!--- Paste example playbooks or commands between quotes below -->
```yaml (paste below)
ansible-test sanity --docker
```


### Expected Results

Expect for docs link to correct navigate to the correct documentation. 

### Actual Results

```console
leads to documentation that 404s. Ex: https://docs.ansible.com/ansible/2.12/dev_guide/testing/sanity/pylint.html
```


### Code of Conduct

- [X] I agree to follow the Ansible Code of Conduct
try:
                        with CaptureStd():
                            doc_choices.append(_type_checker(choice))
                    except (Exception, SystemExit):
                        msg = "Argument '%s' in documentation" % arg
                        if context:
                            msg += " found in %s" % " -> ".join(context)
                        msg += " defines choices as (%r) but this is incompatible with argument type %r" % (choice, _type)
                        self.reporter.error(
                            path=self.object_path,
                            code='doc-choices-incompatible-type',
                            msg=msg
                        )
                        raise StopIteration()
            except StopIteration:
                continue
            arg_choices = []
            try:
                for choice in data.get('choices', []):
                    try:
                        with CaptureStd():
                            arg_choices.append(_type_checker(choice))
                    except (Exception, SystemExit):
                        msg = "Argument '%s' in argument_spec" % arg
                        if context:
                            msg += " found in %s" % " -> ".join(context)
                        msg += " defines choices as (%r) but this is incompatible with argument type %r" % (choice, _type)
                        self.reporter.error(
                            path=self.object_path,
                            code='incompatible-choices',