### 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
if self._is_new_module():
                    self.reporter.error(
                        path=self.object_path,
                        code='missing-return',
                        msg='No RETURN provided'
                    )
                else:
                    self.reporter.warning(
                        path=self.object_path,
                        code='missing-return-legacy',
                        msg='No RETURN provided'
                    )
            else:
                data, errors, traces = parse_yaml(doc_info['RETURN']['value'],
                                                  doc_info['RETURN']['lineno'],
                                                  self.name, 'RETURN')
                if data:
                    add_collection_to_versions_and_dates(data, self.collection_name, is_module=True, return_docs=True)
                self._validate_docs_schema(data, return_schema(for_collection=bool(self.collection)),
                                           'RETURN', 'return-syntax-error')
                for error in errors:
                    self.reporter.error(
                        path=self.object_path,
                        code='return-syntax-error',
                        **error
                    )
                for trace in traces:
                    self.reporter.trace(
                        path=self.object_path,
                        tracebk=trace