### 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
from ansible.plugins.loader import fragment_loader
from ansible.utils.collection_loader._collection_finder import _AnsibleCollectionFinder
from ansible.utils.plugin_docs import REJECTLIST, add_collection_to_versions_and_dates, add_fragments, get_docstring
from ansible.utils.version import SemanticVersion
from .module_args import AnsibleModuleImportError, AnsibleModuleNotInitialized, get_argument_spec
from .schema import ansible_module_kwargs_schema, doc_schema, return_schema
from .utils import CaptureStd, NoArgsAnsibleModule, compare_unordered_lists, is_empty, parse_yaml, parse_isodate
from voluptuous.humanize import humanize_error
from ansible.module_utils.six import PY3, with_metaclass, string_types
if PY3:
    
    TRY_EXCEPT = ast.Try
    
    
    REPLACER_WINDOWS = REPLACER_WINDOWS.decode('utf-8')
else:
    TRY_EXCEPT = ast.TryExcept
REJECTLIST_DIRS = frozenset(('.git', 'test', '.github', '.idea'))
INDENT_REGEX = re.compile(r'([\t]*)')
TYPE_REGEX = re.compile(r'.*(if|or)(\s+[^"\']*|\s+)(?<!_)(?<!str\()type\([^)].*')
SYS_EXIT_REGEX = re.compile(r'[^#]*sys.exit\s*\(.*')
NO_LOG_REGEX = re.compile(r'(?:pass(?!ive)|secret|token|key)', re.I)
REJECTLIST_IMPORTS = {
    'requests': {
        'new_only': True,
        'error': {
            'code': 'use-module-utils-urls',
            'msg': ('requests import found, should use '
                    'ansible.module_utils.urls instead')
        }