[12.x] Add missing Closure type to Collection::pluck() docblock (#57178)

* docs(support): include callable in Collection::pluck() PHPDoc

* Update Collection.php

---------

Co-authored-by: b.sariusta <[email protected]>
Co-authored-by: Taylor Otwell <[email protected]>

Author: 3 people

src/Illuminate/Collections/Collection.php

@@ -792,8 +792,8 @@ public function last(?callable $callback = null, $default = null)
     /**
      * Get the values of a given key.
      *
-     * @param  string|int|array<array-key, string>|null  $value
-     * @param  string|null  $key
+     * @param  \Closure|string|int|array<array-key, string>|null  $value
+     * @param  \Closure|string|null  $key
      * @return static<array-key, mixed>
      */
     public function pluck($value, $key = null)