### 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
mod_collection_name = self.collection_name
            mod_version_added = self._create_strict_version('0.0')
        options = doc.get('options', {}) or {}
        should_be = '.'.join(ansible_version.split('.')[:2])
        strict_ansible_version = self._create_strict_version(should_be, collection_name='ansible.builtin')
        for option, details in options.items():
            try:
                names = [option] + details.get('aliases', [])
            except (TypeError, AttributeError):
                
                continue
            if any(name in existing_options for name in names):
                
                for name in names:
                    existing_collection_name = existing_options.get(name, {}).get('version_added_collection')
                    existing_version = existing_options.get(name, {}).get('version_added')
                    if existing_version:
                        break
                current_collection_name = details.get('version_added_collection')
                current_version = details.get('version_added')
                if current_collection_name != existing_collection_name:
                    self.reporter.error(
                        path=self.object_path,
                        code='option-incorrect-version-added-collection',
                        msg=('version_added for existing option (%s) should '
                             'belong to collection %r. Currently belongs to %r' %
                             (option, current_collection_name, existing_collection_name))
                    )
                elif str(current_version) != str(existing_version):
                    self.reporter.error(