- repo name change and readme change

- removed markdownlint config args as it is no longer a arg. thanks markdownlint-cli2. love changing my workflow :>
    - play pause bind for i3

env/.config/nvim/after/plugin/null-ls.lua

@@ -2,7 +2,7 @@ local ok, null_ls = pcall(require, 'null-ls')
 if ok then
     null_ls.setup({
         sources = {
-            null_ls.builtins.diagnostics.markdownlint_cli2,
+            null_ls.builtins.diagnostics.markdownlint,
         },
     })
 end