### 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 terms is None:
            return
        if not isinstance(terms, Mapping):
            
            return
        for key, value in terms.items():
            if isinstance(value, string_types):
                value = [value]
            if not isinstance(value, (list, tuple)):
                
                continue
            for term in value:
                if not isinstance(term, string_types):
                    
                    continue
            if len(set(value)) != len(value) or key in value:
                msg = "required_by"
                if context:
                    msg += " found in %s" % " -> ".join(context)
                msg += " has repeated terms"
                self.reporter.error(
                    path=self.object_path,
                    code='required_by-collision',
                    msg=msg,
                )
            if not set(value) <= set(spec) or key not in spec: