### 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
doc_options_arg = {}
            else:
                doc_options_arg = doc_options[doc_options_args[0]]
                if len(doc_options_args) > 1:
                    msg = "Argument '%s' in argument_spec" % arg
                    if context:
                        msg += " found in %s" % " -> ".join(context)
                    msg += " with aliases %s is documented multiple times, namely as %s" % (
                        ", ".join([("'%s'" % alias) for alias in aliases]),
                        ", ".join([("'%s'" % alias) for alias in doc_options_args])
                    )
                    self.reporter.error(
                        path=self.object_path,
                        code='parameter-documented-multiple-times',
                        msg=msg
                    )
            try:
                doc_default = None
                if 'default' in doc_options_arg and not is_empty(doc_options_arg['default']):
                    with CaptureStd():
                        doc_default = _type_checker(doc_options_arg['default'])
            except (Exception, SystemExit):
                msg = "Argument '%s' in documentation" % arg
                if context:
                    msg += " found in %s" % " -> ".join(context)
                msg += " defines default as (%r) but this is incompatible with parameter type %r" % (doc_options_arg.get('default'), _type)
                self.reporter.error(
                    path=self.object_path,
                    code='doc-default-incompatible-type',