### 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 removed_in:
                        if not self.collection:
                            strict_ansible_version = self._create_strict_version(
                                '.'.join(ansible_version.split('.')[:2]), self.collection_name)
                            end_of_deprecation_should_be_removed_only = strict_ansible_version >= removed_in
                            if end_of_deprecation_should_be_removed_only:
                                self.reporter.error(
                                    path=self.object_path,
                                    code='ansible-deprecated-module',
                                    msg='Module is marked for removal in version %s of Ansible when the current version is %s' % (
                                        version, ansible_version),
                                )
                        elif self.collection_version:
                            strict_ansible_version = self.collection_version
                            end_of_deprecation_should_be_removed_only = strict_ansible_version >= removed_in
                            if end_of_deprecation_should_be_removed_only:
                                self.reporter.error(
                                    path=self.object_path,
                                    code='collection-deprecated-module',
                                    msg='Module is marked for removal in version %s of this collection when the current version is %s' % (
                                        version, self.collection_version_str),
                                )
                
                if 'removed_at_date' in docs['deprecated']:
                    try:
                        removed_at_date = docs['deprecated']['removed_at_date']
                        if parse_isodate(removed_at_date, allow_date=True) < datetime.date.today():
                            msg = "Module's deprecated.removed_at_date date '%s' is before today" % removed_at_date
                            self.reporter.error(path=self.object_path, code='deprecated-date', msg=msg)
                    except ValueError: