Replace apt installation command for Graphviz with apt-get in app.py

app.py

@@ -38,7 +38,7 @@ with gr.Blocks(theme=theme, title="MarkDown SVG Generator", fill_height=True) as
 import subprocess
 try:
     subprocess.run(["apt", "update"], check=True)
-    # subprocess.run(["apt", "install", "graphviz", "-y"], check=True)
+    subprocess.run(["apt-get", "install", "-y", "graphviz"], check=True)
     app.queue(default_concurrency_limit=25).launch(show_api=True, show_error=True, debug=True)
 except subprocess.CalledProcessError:
     print("Graphviz is not installed. Please install it using `apt install graphviz` and try again.")