fix: Update example_pdfs to store paths as strings for compatibility

app.py

@@ -123,7 +123,7 @@ There are three models available:
 """
 
 example_images = list(Path(__file__).parent.glob("*.jpeg"))
-example_pdfs = list(Path(__file__).parent.glob("*.pdf"))
+example_pdfs = [str(p) for p in Path(__file__).parent.glob("*.pdf")]
 
 with gr.Blocks(title="Arabic Nougat") as demo:
     gr.HTML(