Update requirements.txt

requirements.txt

@@ -1,9 +1,10 @@
-chromadb ==0.5.0
-Flask==3.0.3
-gradio==4.31.5
-huggingface-hub==0.23.0
-openai==1.30.1
-langchain==0.2.0
-langchain-community==0.2.0
-fitz
-twilio
+chromadb ==0.5.0
+Flask==3.0.3
+gradio==4.31.5
+huggingface-hub==0.23.0
+openai==1.30.1
+langchain==0.2.0
+langchain-community==0.2.0
+fitz
+twilio
+pyngrok