[BUG] Default “content/posts” can't work. This theme use "content/post" instead.

[airixz]

Describe the bug
When I change to this theme. all the posts can't be render and show on the main page. But the exampleSite work well.
Finally, I find the different is in exampleSite, all posts is placed in folder "content/post"; but in my site, it's "content/posts".

I change my folder name from "posts" to "post", it works.
or modify the default layout index.html, list.html, single.html, change the related type from "post" to "posts".

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Run with '....'
3. See the error

Expected behavior
The hugo document give the default post in "content/posts" folder.
So I suggest the Theme can follow this default name.

Additional context
Add any other context about the problem here.