Adding notebook for function calling with Elasticsearch (#250)

* Adding notebook for function calling with Elasticsearch

Author: ashishtiwari1993

bin/find-notebooks-to-test.sh

@@ -21,6 +21,7 @@ EXEMPT_NOTEBOOKS=(
     "notebooks/integrations/gemini/vector-search-gemini-elastic.ipynb"
     "notebooks/integrations/gemini/qa-langchain-gemini-elasticsearch.ipynb"
     "notebooks/integrations/openai/openai-KNN-RAG.ipynb"
+    "notebooks/integrations/openai/function-calling.ipynb"
     "notebooks/integrations/gemma/rag-gemma-huggingface-elastic.ipynb"
     "notebooks/integrations/azure-openai/vector-search-azure-openai-elastic.ipynb"
     "notebooks/enterprise-search/app-search-engine-exporter.ipynb"