### 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
parser = argparse.ArgumentParser(prog="validate-modules")
    parser.add_argument('modules', nargs='+',
                        help='Path to module or module directory')
    parser.add_argument('-w', '--warnings', help='Show warnings',
                        action='store_true')
    parser.add_argument('--exclude', help='RegEx exclusion pattern',
                        type=re_compile)
    parser.add_argument('--arg-spec', help='Analyze module argument spec',
                        action='store_true', default=False)
    parser.add_argument('--base-branch', default=None,
                        help='Used in determining if new options were added')
    parser.add_argument('--format', choices=['json', 'plain'], default='plain',
                        help='Output format. Default: "%(default)s"')
    parser.add_argument('--output', default='-',
                        help='Output location, use "-" for stdout. '
                             'Default "%(default)s"')
    parser.add_argument('--collection',
                        help='Specifies the path to the collection, when '
                             'validating files within a collection. Ensure '
                             'that ANSIBLE_COLLECTIONS_PATH is set so the '
                             'contents of the collection can be located')
    parser.add_argument('--collection-version',
                        help='The collection\'s version number used to check '
                             'deprecations')