### 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
version_added_raw = doc.get('version_added')
        try:
            collection_name = doc.get('version_added_collection')
            version_added = self._create_strict_version(
                str(version_added_raw or '0.0'),
                collection_name=collection_name)
        except ValueError as e:
            version_added = version_added_raw or '0.0'
            if self._is_new_module() or version_added != 'historical':
                
                if version_added == 'historical':
                    self.reporter.error(
                        path=self.object_path,
                        code='module-invalid-version-added',
                        msg='version_added is not a valid version number: %r. Error: %s' % (version_added, e)
                    )
                return
        if existing_doc and str(version_added_raw) != str(existing_doc.get('version_added')):
            self.reporter.error(
                path=self.object_path,
                code='module-incorrect-version-added',
                msg='version_added should be %r. Currently %r' % (existing_doc.get('version_added'), version_added_raw)
            )
        if not self._is_new_module():
            return
        should_be = '.'.join(ansible_version.split('.')[:2])
        strict_ansible_version = self._create_strict_version(should_be, collection_name='ansible.builtin')
        if (version_added < strict_ansible_version or
                strict_ansible_version < version_added):