fix typo

app.py

@@ -117,7 +117,7 @@ with gr.Blocks() as demo:
 
     ## Steps
 
-    1. Click **Upload** to upload your data and visualize it or select one of the example CVS.
+    1. Click **Upload** to upload your data and visualize it **or** select one of the example CSV files.
     2. Click **Run**
         - This app will then train an estimator and show its predictions as well as evaluation metrics.
     """
@@ -144,7 +144,7 @@ with gr.Blocks() as demo:
     upload_btn.upload(
         fn=preprocess,
         inputs=[upload_btn, prediction_length, windows],
-        outputs=plot,
+        outputs=[plot],
     )
     train_btn.click(
         fn=train_and_forecast,