feat: update comment module "Artalk"

[cdn0x12]

The Artalk comment module is not compatible with Artalk v2.7+, which requires invocation on an instance created by either Artalk.init or new Artalk.

The original code.yml will result in below error:

Uncaught TypeError: Artalk is not a constructor
    onload https://<wiki-js-url>/:42
[<wiki-js-url>:42:5](https://<wiki-js-url>/)
    onload https://<wiki-js-url>/:42

The updated code.yml works for both v2.7+ and older versions (tested with v2.6.4)