Update requirements.txt

requirements.txt

@@ -1,7 +1,8 @@
-gradio==3.50.2
-openai-whisper==20231117
-torch==2.1.0
-numpy==1.26.2
-ffmpeg-python==0.2.0
-tqdm==4.66.1
-cryptography==41.0.5
+--upgrade pip
+gradio>=3.0,<4.0
+openai-whisper>=20231117
+torch~=2.1.0
+numpy
+ffmpeg-python>=0.2.0
+tqdm>=4.66
+cryptography>=41.0