### 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
path=self.object_path,
                    code='missing-documentation',
                    msg='No DOCUMENTATION provided'
                )
            else:
                documentation_exists = True
                doc, errors, traces = parse_yaml(
                    doc_info['DOCUMENTATION']['value'],
                    doc_info['DOCUMENTATION']['lineno'],
                    self.name, 'DOCUMENTATION'
                )
                if doc:
                    add_collection_to_versions_and_dates(doc, self.collection_name, is_module=True)
                for error in errors:
                    self.reporter.error(
                        path=self.object_path,
                        code='documentation-syntax-error',
                        **error
                    )
                for trace in traces:
                    self.reporter.trace(
                        path=self.object_path,
                        tracebk=trace
                    )
                if not errors and not traces:
                    missing_fragment = False
                    with CaptureStd():
                        try:
                            get_docstring(self.path, fragment_loader, verbose=True,
                                          collection_name=self.collection_name, is_module=True)