docs typo: hugo new content posts/my-first-post.md

[jakegatsby]

I believe there is a typo on the https://gohugo.io/getting-started/quick-start/ page for "Add content":

hugo new content posts/my-first-post.md

I don't think the content arg is supposed to be there, and the command should be:

hugo new posts/my-first-post.md

[jmooring]

All of these work with v0.112.0 or later, which is why the quick start guide requires v0.112.0 or later.

hugo new content content/posts/foo.md
hugo new content posts/foo.md
hugo new content/posts/foo.md
hugo new posts/foo.md

We currently don't require the "content" subcommand; this provides backward compatibility. The "content" subcommand was added in v0.112.0.