fix: change typo method name (#351)

why we chosed to raname without depracted. this method call for dump data (uder dev) its not effect in production.

src/System/Collection/AbstractCollectionImmutable.php

@@ -203,7 +203,7 @@ public function each($callable): self
     /**
      * @return $this
      */
-    public function dumb(): self
+    public function dump(): self
     {
         var_dump($this->collection);