Update app.py

app.py

@@ -182,7 +182,7 @@ def layoutjson2md(image: Image.Image, layout_data: List[Dict], text_key: str = '
                             buffer = BytesIO()
                             cropped_img.save(buffer, format='PNG')
                             img_data = base64.b64encode(buffer.getvalue()).decode()
-                            markdown_lines.append(f"<image-card alt="Image" src="data:image/png;base64,{img_data}" ></image-card>\n")
+                            markdown_lines.append(f'<image-card alt="Image" src="data:image/png;base64,{img_data}" ></image-card>\n')
                         else:
                             markdown_lines.append("<image-card alt="Image" src="Image region detected" ></image-card>\n")
                     except Exception as e: