### 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
"""Write results to a file for ansibullbot to consume."""
        docs = self.find_docs()
        message = self.format_title(help_link=docs)
        output = self.format_block()
        if self.messages:
            verified = all((m.confidence or 0) >= 50 for m in self.messages)
        else:
            verified = False
        bot_data = dict(
            verified=verified,
            docs=docs,
            results=[
                dict(
                    message=message,
                    output=output,
                ),
            ],
        )
        if args.explain:
            return
        write_json_test_results(ResultType.BOT, self.create_result_name('.json'), bot_data)
    def populate_confidence(self, metadata):