use a proper function for this instead of checking 200

Signed-off-by: girlbossceo <june@girlboss.ceo>

src/api/appservice_server.rs

@@ -79,7 +79,7 @@ where
         Vec::new().into()
     }); // TODO: handle timeout
 
-    if status != 200 {
+    if !status.is_success() {
         warn!(
             "Appservice returned bad response {} {}\n{}\n{:?}",
             destination,