docs: add @intlify/h3 to community packages

[kazupon]

🔗 Linked issue

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[codecov]

Codecov Report

Merging #559 (151c887) into main (fb79f41) will not change coverage.
Report is 1 commits behind head on main.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #559   +/-   ##
=======================================
  Coverage   83.83%   83.83%           
=======================================
  Files          31       31           
  Lines        3563     3563           
  Branches      540      540           
=======================================
  Hits         2987     2987           
  Misses        576      576           

[NozomuIkuta]

Thank you for the PR!
I confirmed that the URL is correct and all methods listed up actually exist in the repo.