Mention :name in Permalink config

[SukkaW]

https://hexo.io/docs/permalinks

:title refers to the post source file path relative to source/_posts while :name is the exactly filename.

[SukkaW]

Example:

# _config.yml
url: https://example.com
root: /
permalink: :title/

source/_posts/hello-world.md => https://example.com/hello-world/
source/_posts/2019/hello-world.md => https://example.com/2019/hello-world/

# _config.yml
url: https://example.com
root: /
permalink: :name/

source/_posts/hello-world.md => https://example.com/hello-world/
source/_posts/2019/hello-world.md => https://example.com/hello-world/