### 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
collection_namespace_path, collection_name = os.path.split(self.collection)
            self.collection_name = '%s.%s' % (os.path.basename(collection_namespace_path), collection_name)
        self.routing = routing
        self.collection_version = None
        if collection_version is not None:
            self.collection_version_str = collection_version
            self.collection_version = SemanticVersion(collection_version)
        self.base_branch = base_branch
        self.git_cache = git_cache or GitCache()
        self._python_module_override = False
        with open(path) as f:
            self.text = f.read()
        self.length = len(self.text.splitlines())
        try:
            self.ast = ast.parse(self.text)
        except Exception:
            self.ast = None
        if base_branch:
            self.base_module = self._get_base_file()
        else:
            self.base_module = None
    def _create_version(self, v, collection_name=None):
        if not v:
            raise ValueError('Empty string is not a valid version')
        if collection_name == 'ansible.builtin':
            return LooseVersion(v)
        if collection_name is not None:
            return SemanticVersion(v)
        return self._Version(v)
    def _create_strict_version(self, v, collection_name=None):