link check fail

[lazarusA]

I noticed that whenever we have something like:

[section in](./folder/section) referencing to another md file in our working directory then the following shows up:

Warning: invalid local link/image: file does not exist in src/get_started.md
│   link =
│    @ast MarkdownAST.Link("./folder/section", "") do
│      MarkdownAST.Text("section in")
│    end

which we can ignore by

makedocs(;
    warnonly = true,)

which will also hide other issues, not ideal.