The comments of the configuration of which-key are outdated

[LorenzoBettini]

Describe the bug

The documentation of the configuration of which-key are outdated since it mentions the config method (as in the video https://www.youtube.com/watch?v=m8C0Cq9Uv9o) but they are now based on opts:

  -- Then, because we use the `config` key, the configuration only runs
  -- after the plugin has been loaded:
  --  config = function() ... end
...
  { -- Useful plugin to show you pending keybinds.
    'folke/which-key.nvim',
    event = 'VimEnter', -- Sets the loading event to 'VimEnter'
    opts = {
      icons = {

To Reproduce

1. ...

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