### 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
msg += " defines type as %r but documentation defines type as %r" % (data['type'], doc_type)
                    self.reporter.error(
                        path=self.object_path,
                        code='doc-type-does-not-match-spec',
                        msg=msg
                    )
            else:
                if doc_type is None:
                    msg = "Argument '%s' in argument_spec" % arg
                    if context:
                        msg += " found in %s" % " -> ".join(context)
                    msg += " uses default type ('str') but documentation doesn't define type"
                    self.reporter.error(
                        path=self.object_path,
                        code='doc-missing-type',
                        msg=msg
                    )
                elif doc_type != 'str':
                    msg = "Argument '%s' in argument_spec" % arg
                    if context:
                        msg += " found in %s" % " -> ".join(context)
                    msg += " implies type as 'str' but documentation defines as %r" % doc_type
                    self.reporter.error(
                        path=self.object_path,
                        code='implied-parameter-type-mismatch',
                        msg=msg
                    )
            doc_choices = []
            try:
                for choice in doc_options_arg.get('choices', []):