Update variable name for better readability

src/bot.rs

@@ -119,13 +119,13 @@ pub async fn fetch_and_announce_appointment(
 
 	let entry = ChatInfo::from(entry);
 
-	let new_appointment = entry
+	let is_new_appointment = entry
 		.next_appointment
 		.as_ref()
 		.map(|db_appointment| db_appointment.start != appointment.start)
 		.unwrap_or(true);
 
-	if !new_appointment {
+	if !is_new_appointment {
 		return Ok(());
 	}