Update app.py

app.py

@@ -133,7 +133,7 @@ def process_pdf(file_path):
 def gradio_interface(file):
     # Step 1: Correct the skew of the input file
     corrected_images = []
-    if file.name.endswith('.pdf'):
+    if file.name.lower().endswith('.pdf'):
         images = convert_from_path(file.name)
         for i, image in enumerate(images):
             corrected_image = correct_image_rotation(image)