Update app.py

app.py

@@ -19,7 +19,7 @@ with gr.Blocks(
     "#chatbot { flex-grow: 1 !important; overflow: auto !important;}"
     "#col { height: calc(100vh - 112px - 16px) !important; }"
     "#submit { cursor: pointer; "
-    ": hover {background-color: green;} }",
+    ":hover {background-color: green !important;} }",
     theme=gr.themes.Soft(font=[gr.themes.GoogleFont("Martel Sans")])                   
 ) as demo:
     gr.Markdown("# GPT4All Chatbot")