fix: convert param type from nested array to array of strings (#54659)

Author: simonellensohn

src/Illuminate/Database/Eloquent/Concerns/QueriesRelationships.php

@@ -374,7 +374,7 @@ public function whereHasMorph($relation, $types, ?Closure $callback = null, $ope
  * @template TRelatedModel of \Illuminate\Database\Eloquent\Model
  *
  * @param \Illuminate\Database\Eloquent\Relations\MorphTo<TRelatedModel, *>|string $relation
- * @param string|array<int, array> $types
+ * @param string|array<int, string> $types
  * @param (\Closure(\Illuminate\Database\Eloquent\Builder<TRelatedModel>, string): mixed)|null $callback
  * @param string $operator
  * @param int $count