### 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
header = '\n'.join(self.text.split('\n')[:20])
        if ('GNU General Public License' not in header or
                ('version 3' not in header and 'v3.0' not in header)):
            self.reporter.error(
                path=self.object_path,
                code='missing-gplv3-license',
                msg='GPLv3 license header not found in the first 20 lines of the module'
            )
        elif self._is_new_module():
            if len([line for line in header
                    if 'GNU General Public License' in line]) > 1:
                self.reporter.error(
                    path=self.object_path,
                    code='use-short-gplv3-license',
                    msg='Found old style GPLv3 license header: '
                        'https://docs.ansible.com/ansible/devel/dev_guide/developing_modules_documenting.html#copyright'
                )
    def _check_for_subprocess(self):