Add hyphen between type and subject

src/main.rs

@@ -91,7 +91,7 @@ async fn ics(url: &str) -> String {
         let mut new_event = Event::new();
 
         new_event
-            .summary(&format!("{kind} {subject}"))
+            .summary(&format!("{kind} - {subject}"))
             .description(description)
             .starts(start)
             .ends(end);