### 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 the test results to various locations."""
        if args.metadata.changes:
            self.populate_confidence(args.metadata)
        super().write(args)
    def write_console(self):  
        """Write results to console."""
        if self.summary:
            display.error(self.summary)
        else:
            if self.python_version:
                specifier = ' on python %s' % self.python_version
            else:
                specifier = ''
            display.error('Found %d %s issue(s)%s which need to be resolved:' % (len(self.messages), self.test or self.command, specifier))
            for message in self.messages:
                display.error(message.format(show_confidence=True))
            doc_url = self.find_docs()
            if doc_url:
                display.info('See documentation for help: %s' % doc_url)
    def write_lint(self):