refactor: update file upload component in app.py

app.py

@@ -133,12 +133,8 @@ with gr.Blocks() as demo:
             step=1,
         )
         private = gr.Checkbox(False, label="Upload dataset to a private repo?")
-    upload_button = gr.UploadButton(
-        "Load files to corpus",
-        file_types=[
-            "text",
-        ],
-        file_count="multiple",
+    upload_button = gr.File(
+        file_types=["text"], file_count="multiple", height=50, interactive=True
     )
     summary = gr.Markdown()