### 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
def __init__(self, base_branch):
        self.base_branch = base_branch
        if self.base_branch:
            self.base_tree = self._git(['ls-tree', '-r', '--name-only', self.base_branch, 'lib/ansible/modules/'])
        else:
            self.base_tree = []
        try:
            self.head_tree = self._git(['ls-tree', '-r', '--name-only', 'HEAD', 'lib/ansible/modules/'])
        except GitError as ex:
            if ex.status == 128:
                
                self.head_tree = self._get_module_files()
            else:
                raise
        except OSError as ex:
            if ex.errno == errno.ENOENT:
                
                self.head_tree = self._get_module_files()
            else:
                raise
        self.base_module_paths = dict((os.path.basename(p), p) for p in self.base_tree if os.path.splitext(p)[1] in ('.py', '.ps1'))
        self.base_module_paths.pop('__init__.py', None)
        self.head_aliased_modules = set()
        for path in self.head_tree:
            filename = os.path.basename(path)
            if filename.startswith('_') and filename != '__init__.py':
                if os.path.islink(path):
                    self.head_aliased_modules.add(os.path.basename(os.path.realpath(path)))
    @staticmethod
    def _get_module_files():