docs: fix typo (#746)

Author: tiagovla

README.md

@@ -58,7 +58,7 @@ require'nvim-tree'.setup {
   },
   -- hijack the cursor in the tree to put it at the start of the filename
   hijack_cursor       = false,
-  -- updates the root directory of the tree on `DirChanged` (when your run `:cd` usually)
+  -- updates the root directory of the tree on `DirChanged` (when you run `:cd` usually)
   update_cwd          = false,
   -- show lsp diagnostics in the signcolumn
   diagnostics = {