fix(readme): remove black as linter (#2510)

README.md

@@ -107,7 +107,6 @@ formatters.setup {
 -- set additional linters
 local linters = require "lvim.lsp.null-ls.linters"
 linters.setup {
-  { command = "black" },
   {
     command = "eslint_d",
     ---@usage specify which filetypes to enable. By default a providers will attach to all the filetypes it supports.