### 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
self._ensure_default_entry(path)
        lvl_dct = self.files[path]['%ss' % level]
        lvl_dct.append({
            'code': code,
            'msg': msg,
            'line': line,
            'column': column
        })
    def error(self, *args, **kwargs):
        self._log(*args, level='error', **kwargs)
    def warning(self, *args, **kwargs):
        self._log(*args, level='warning', **kwargs)
    def trace(self, path, tracebk):
        self._ensure_default_entry(path)
        self.files[path]['traces'].append(tracebk)
    def warning_trace(self, path, tracebk):
        self._ensure_default_entry(path)
        self.files[path]['warning_traces'].append(tracebk)
    @staticmethod
    @contextmanager
    def _output_handle(output):
        if output != '-':
            handle = open(output, 'w+')
        else:
            handle = sys.stdout
        yield handle
        handle.flush()
        handle.close()
    @staticmethod
    def _filter_out_ok(reports):