Add \DateTimeInterface and \DateInterval to type for `Cache::flex…

…ible()` (#52888)

src/Illuminate/Cache/Repository.php

@@ -479,7 +479,7 @@ public function rememberForever($key, Closure $callback)
      * @template TCacheValue
      *
      * @param  string  $key
-     * @param  array{ 0: int, 1: int }  $ttl
+     * @param  array{ 0: \DateTimeInterface|\DateInterval|int, 1: \DateTimeInterface|\DateInterval|int }  $ttl
      * @param  (callable(): TCacheValue)  $callback
      * @param  array{ seconds?: int, owner?: string }|null  $lock
      * @return TCacheValue