Bump gradio version (make sure to update)

This fixes the textbox shrinking vertically once it reaches
a certain number of lines.

requirements.txt

@@ -1,7 +1,7 @@
 accelerate==0.18.0
 bitsandbytes==0.37.2
 flexgen==0.1.7
-gradio==3.23.0
+gradio==3.24.0
 markdown
 numpy
 peft==0.2.0