### 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
if documentation_collection != self.collection_name:
                            self.reporter.error(
                                path=self.object_path,
                                code='deprecation-wrong-collection',
                                msg='"DOCUMENTATION.deprecation.removed_from_collection must be the current collection name: %r vs. %r' % (
                                    documentation_collection, self.collection_name)
                            )
                    else:
                        doc_deprecated = False
                    if os.path.islink(self.object_path):
                        
                        
                        self._validate_docs_schema(
                            doc,
                            doc_schema(
                                os.readlink(self.object_path).split('.')[0],
                                for_collection=bool(self.collection),
                                deprecated_module=deprecated,
                            ),
                            'DOCUMENTATION',
                            'invalid-documentation',
                        )
                    else:
                        
                        self._validate_docs_schema(
                            doc,
                            doc_schema(
                                self.object_name.split('.')[0],
                                for_collection=bool(self.collection),
                                deprecated_module=deprecated,