Add refer for livere

[KaitoHH]

PR Type

What kind of change does this PR introduce?

• Bugfix.
• Feature.
• Code style update (formatting, local variables).
• Refactoring (no functional changes, no api changes).
• Build related changes.
• CI related changes.
• Documentation content changes.
• Other... Please describe:

What is the current behavior?

When you use LiveRe comment box, LiveRe uses full URL as its identifier by default. Consider these 2 URLs:

example.com/my_article/
example.com/my_article/index.html

These two URLs actually access to the same page, but LiveRe will treat them differently, so you won't see same comments on these two URLs.

What is the new behavior?

I added refer to be equal to page.path according to the official documentation. Since this way is also be used in disqus when defining identifier:

hexo-theme-next/layout/_third-party/comments/disqus.swig

Line 11 in 79932de

this.page.identifier = '{{ page.path }}';

I believe it can fix this bug.

Does this PR introduce a breaking change?

• Yes.
• No.