Suggested improvement for `/modifiers/shuffle`

[AtmoFX]

From a recent discussion I had with Duncan: statamic/cms#11719 (comment)

I believe the documentation could use a small example of how to shuffle a collection's entries (though it could be an exact equivalent of sort="random"; I do not know if one is faster than the other).

• The Antlers syntax uses a self-iterating assignment (if there is a better option, make sure to use it instead):

  {{ randomly_sorted_pages = { collection:pages } | shuffle }}
      {{# Do your thing here #}}
  {{ /randomly_sorted_pages }}
  

• As for the Blade syntax, since I do not use Blade, I can't say.