Run clippy fix

src/parsers/ical_parser.rs

@@ -142,12 +142,12 @@ fn parse_ical_datetime(value: &str, property: &Property) -> Result<Option<i64>>
 }
 
 fn extract_email_from_mailto(value: Option<&str>) -> Option<String> {
-    value.and_then(|v| {
+    value.map(|v| {
         // ORGANIZER and ATTENDEE often have format: mailto:user@example.com
         if v.starts_with("mailto:") {
-            Some(v.trim_start_matches("mailto:").to_string())
+            v.trim_start_matches("mailto:").to_string()
         } else {
-            Some(v.to_string())
+            v.to_string()
         }
     })
 }