### 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
module_files = []
        for (dir_path, dir_names, file_names) in os.walk('lib/ansible/modules/'):
            for file_name in file_names:
                module_files.append(os.path.join(dir_path, file_name))
        return module_files
    @staticmethod
    def _git(args):
        cmd = ['git'] + args
        p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        stdout, stderr = p.communicate()
        if p.returncode != 0:
            raise GitError(stderr, p.returncode)
        return stdout.decode('utf-8').splitlines()
class GitError(Exception):
    def __init__(self, message, status):
        super(GitError, self).__init__(message)
        self.status = status
def main():
    try:
        run()
    except KeyboardInterrupt:
        pass