src: main: Document a potential panic condition

src/main.rs

@@ -75,6 +75,7 @@ async fn main() -> anyhow::Result<()> {
                     StatusMessage { contact: false, .. } => (Some(LolOpenerStatus::Open), "🟢 Le LOL est ouvert :)"),
                 };
 
+                //XXX: Panic if the lock is poisoned (why would that happen?)
                 let mut current_status = current_status.lock().unwrap();
                 if new_status != *current_status {
                     debug!("Sending msg {}", msg);