Update app.py

app.py

@@ -128,7 +128,7 @@ The extractive models for this app are using sentence-transformer models, which
             with gr.Row():
                 with gr.Column(scale=4):
                     text_extract= gr.TextArea(label="Input text to summarize", placeholder="Input text")
-                    extract_button = gr.Button("Summarize!")
+                    extract_button = gr.Button("Summarize!", variant='primary')
                 with gr.Column(scale=3):
                     with gr.Row():
                         ex_sent =gr.Slider(minimum=1, maximum=7, value=4, step=1, label="Sentences to return")