### 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
try:
        date1 = parse_isodate(d1, allow_date=True)
        date2 = parse_isodate(d2, allow_date=True)
        return date1 == date2
    except ValueError:
        
        return d1 == d2
class ReporterEncoder(json.JSONEncoder):
    def default(self, o):
        if isinstance(o, Exception):
            return str(o)
        return json.JSONEncoder.default(self, o)
class Reporter:
    def __init__(self):
        self.files = OrderedDict()
    def _ensure_default_entry(self, path):
        try:
            self.files[path]
        except KeyError:
            self.files[path] = {
                'errors': [],
                'warnings': [],
                'traces': [],
                'warning_traces': []
            }
    def _log(self, path, code, msg, level='error', line=0, column=0):