Replace is_integer() with is_int() (#55851)

Co-authored-by: Xurshudyan <v.khurshudyan@aico.swiss>

Author: xurshudyan

src/Illuminate/Collections/Arr.php

@@ -558,7 +558,7 @@ public static function integer(ArrayAccess|array $array, string|int|null $key, ?
     {
         $value = Arr::get($array, $key, $default);
 
-        if (! is_integer($value)) {
+        if (! is_int($value)) {
             throw new InvalidArgumentException(
                 sprintf('Array value for key [%s] must be an integer, %s found.', $key, gettype($value))
             );