Refactor telemetry import handling in `app.py` to remove redundant code

src/gaia_solving_agent/app.py

@@ -3,7 +3,7 @@ import gradio as gr
 
 try:
     from gaia_solving_agent.telemetry import set_telemetry
-except ImportError:
+except ModuleNotFoundError:
     os.system("pip install -e .")
     from gaia_solving_agent.telemetry import set_telemetry
 from gaia_solving_agent.hf_submission_api import (