Update requirements.txt

requirements.txt

@@ -1,6 +1,4 @@
-gradio==6.8.0
-openai==2.41.0
-python-dotenv==1.2.2
-cloudscraper>=1.2,<2
-trafilatura>=2.0,<3
-markitdown>=0.1,<1
+gradio
+openai
+python-dotenv
+markitdown