Categories page always uses the plural of 'post'

[GenericMadScientist]

Checklist

• I have read the tutorials and know the correct effect of the functional design.
• There are no similar reports on existing issues (including closed ones).
• I found the bug on the latest code of the master branch.

Describe the bug

On the categories page, even categories with 1 post will say '1 posts'. Looking at the code for _layouts/categories.html, there is no check for exactly 1 post so this issue will arise with any locale that requires different words for different amounts of posts.

To Reproduce

Steps to reproduce the behavior: have a category with exactly 1 post. This is exhibited by the demo site with the 'Demo' category.

Expected behavior

Such categories should use the appropriate word for the number of posts, so in this case say '1 post' instead of '1 posts'.

Screenshots

Environment

Command	Version
ruby -v	2.7.3
gem -v	3.1.6
bundle -v	2.2.20
bundle exec jekyll -v	4.2.2
bundle info jekyll-theme-chirpy	5.1.0

Desktop

• OS: Windows 10
• Browser: Firefox 101.0

Smartphone

Additional context

None.

[github-actions]

👋 Hi @GenericMadScientist,

This issue is being automatically closed because it does not follow the issue template. Please DO NOT open another similar issue, try to edit the current issue according to the template, then it will be reopened automatically.