Fix incorrect call to clap

src/main.rs

@@ -26,7 +26,7 @@ async fn main() {
         }
     };
 
-    let master_link = matches.get_one::<Box<str>>("link").unwrap().as_ref();
+    let master_link = matches.get_one::<String>("link").unwrap().as_ref();
     let base_url = match get_base_url(master_link) {
         Ok(url) => url,
         Err(e) => {