fix: the height of docs view get wrong when content lines get wrapped

[adoyle-h]

When the wrap_at option not pass to vim.lsp.util._make_floating_popup_size(), it calculates height with unwrapped lines. Actually the nvim-cmp shows content with wrapped lines in docs view. So when the content has very long text, the calculated height is smaller than actually required in docs view.

Before:

After fixed: