Update requirements.txt

requirements.txt

@@ -1,6 +1,6 @@
-streamlit>=1.20
-google-generativeai>=0.8.0
-python-dotenv>=1.0
-python-ffmpeg>=2.0.0
-requests>=2.28
-tqdm>=4.65
+streamlit>=1.20,<2.0
+yt-dlp>=2024.1,<2026
+ffmpeg-python>=0.2.0,<1.0
+python-dotenv>=1.0.0,<2.0
+duckduckgo-search>=8.1.1,<9.0
+google-generativeai>=0.8.5,<2.0