Update 43_Building_a_Tool_Calling_Agent.ipynb

Add forgotten import

Author: sjrl

tutorials/43_Building_a_Tool_Calling_Agent.ipynb

@@ -204,8 +204,8 @@
    "outputs": [],
    "source": [
     "from haystack.components.builders.answer_builder import AnswerBuilder\n",
-    "from haystack.components.builders.chat_prompt_builder import ChatPromptBuilder\n",
     "from haystack.components.converters.html import HTMLToDocument\n",
+    "from haystack.components.converters.output_adapter import OutputAdapter\n",
     "from haystack.components.fetchers.link_content import LinkContentFetcher\n",
     "from haystack.components.websearch.serper_dev import SerperDevWebSearch\n",
     "from haystack.dataclasses import ChatMessage\n",