### 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
REJECTLIST_PATTERNS = ('.git*', '*.pyc', '*.pyo', '.*', '*.md', '*.rst', '*.txt')
    REJECTLIST_FILES = frozenset(('.git', '.gitignore', '.travis.yml',
                                  '.gitattributes', '.gitmodules', 'COPYING',
                                  '__init__.py', 'VERSION', 'test-docs.sh'))
    REJECTLIST = REJECTLIST_FILES.union(REJECTLIST['MODULE'])
    PS_DOC_REJECTLIST = frozenset((
        'async_status.ps1',
        'slurp.ps1',
        'setup.ps1'
    ))
    
    PS_ARG_VALIDATE_REJECTLIST = frozenset(('win_dsc.ps1', ))
    ACCEPTLIST_FUTURE_IMPORTS = frozenset(('absolute_import', 'division', 'print_function'))
    def __init__(self, path, analyze_arg_spec=False, collection=None, collection_version=None,
                 base_branch=None, git_cache=None, reporter=None, routing=None):
        super(ModuleValidator, self).__init__(reporter=reporter or Reporter())
        self.path = path
        self.basename = os.path.basename(self.path)
        self.name = os.path.splitext(self.basename)[0]
        self.analyze_arg_spec = analyze_arg_spec
        self._Version = LooseVersion
        self._StrictVersion = StrictVersion
        self.collection = collection
        self.collection_name = 'ansible.builtin'
        if self.collection:
            self._Version = SemanticVersion
            self._StrictVersion = SemanticVersion