Some options for site.lang are incompatible with giscus API

[tripercy]

Checklist

• I have read and accepted the contributing guidelines.

How did you create the site?

Built from jekyll-theme-chirpy

Describe the bug

The giscus comment system won't work if its lang option is set to default (leaving "giscus:lang:" empty in _config.yml) AND site.lang is set to a language option with a language code followed by a country code, i.e. vi-VN, en-ES.
Instead of displaying a comment section, the IFrame displays "Giscus.app refused to connect".

Steps To Reproduce

1. Setup an app using chirpy theme in the given environment.
2. Create a sample post in that app.
3. Go to giscus.app and configure a repository for comments.
4. In _config.yml, set the following configs:

lang: vi-VN
...
comments:
 provider: giscus
 ...
 giscus:
  ... // The configs obtained from https://giscus.app/
  lang: 
  ...

5. Build and serve the app

bundle exec jekyll s

6. Go to the sample post and scroll to the comment section.
7. Observe the bug: the for the comment section displays: "Giscus.app refused to connect".

Expected Behavior

The comment section displayed correctly

Environment

• Ruby: ruby 3.3.2 (2024-05-30 revision e5a195edf6) [arm64-darwin22]
• Jekyll: jekyll 4.3.3
• Chirpy: jekyll-theme-chirpy (7.0.1)

Anything else?

After checking the giscus API, I noticed that the language codes for available languages never have a following country code, so the language options with the code of that type will cause the API call to fail.

[cotes2020]

Good catch 👍

[github-actions]

🎉 This issue has been resolved in version 7.1.0 🎉

The release is available on:

• v7.1.0
• GitHub release

Your semantic-release bot 📦🚀