Update umami to use cdn

[LeenHawk]

PR Checklist

• The commit message follows guidelines for NexT.
• The changes have been tested (for bug fixes / features).
• Docs in NexT website have been added / updated (for features).

PR Type

• Bugfix.
• Feature.
• Improvement.
• Code style update (formatting, linting).
• Refactoring (no functional changes).
• Documentation.
• Translation.
• Other... Please describe:

What is the current behavior?

umima can't use cdn

Issue resolved:

None.

What is the new behavior?

According to Umima issue

• Link to demo site with this changes:
• Screenshots with this changes:

How to use?

In NexT _config.yml:

umami:
  enable: false
  script_url: # https://umami.example.com/script.js
  website_id: # <your website id>
  data_host_url: # <your umami site url>

[welcome]

Congrats on merging your first pull request here! 🎉 How awesome!

[stevenjoezhang]

Besides, it's called umami, not umima 😂

[LeenHawk]

Besides, it's called umami, not umima 😂

Another example of the order of PinYin doesn't affect read in Chinese 😂