fix: streamed response tool call without arguments

Author: L3o-pold

src/Responses/Chat/CreateStreamedResponseToolCallFunction.php

@@ -18,7 +18,7 @@ public static function from(array $attributes): self
     {
         return new self(
             $attributes['name'] ?? null,
-            $attributes['arguments'],
+            $attributes['arguments'] ?? '',
         );
     }