### 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
"""Load and return the CI YAML configuration."""
        if not self._ci_config:
            self._ci_config = self.load_yaml(python, self.CI_YML)
        return self._ci_config
    @property
    def ci_test_groups(self):  
        """Return a dictionary of CI test names and their group(s)."""
        if not self._ci_test_groups:
            test_groups = {}
            for stage in self._ci_config['stages']:
                for job in stage['jobs']:
                    if job.get('template') != 'templates/matrix.yml':
                        continue
                    parameters = job['parameters']
                    groups = parameters.get('groups', [])
                    test_format = parameters.get('testFormat', '{0}')
                    test_group_format = parameters.get('groupFormat', '{0}/{{1}}')
                    for target in parameters['targets']:
                        test = target.get('test') or target.get('name')
                        if groups:
                            tests_formatted = [test_group_format.format(test_format).format(test, group) for group in groups]
                        else:
                            tests_formatted = [test_format.format(test)]
                        for test_formatted in tests_formatted:
                            parts = test_formatted.split('/')
                            key = parts[0]
                            if key in ('sanity', 'units'):
                                continue