Update app.py

app.py

@@ -83,7 +83,7 @@ readme_html = """
         <p><strong>More details:</strong></p>
         <p>We present a demo for performing object segmentation with training a Yolov8-seg on Materials dataset. The model was trained on 4424 training images and validated on 464 images.</p>
         <p><strong>Usage:</strong></p>
-        <p>You can upload wheel Image images, and the demo will provide you with your segmented image.</p>
+        <p>You can upload Material images, and the demo will provide you with your segmented image.</p>
         <p><strong>Dataset:</strong></p>
         <p>The dataset contains 6,365 images and is formatted in COCO style. To facilitate usage with YOLOv8-seg, we have converted it into YOLOv8 format</p>
         <ul>