moved announcement message unpinning

src/lib.rs

@@ -156,6 +156,10 @@ pub async fn run_contest(
     if contest.counts.is_empty() {
         announcement.delete(&ctx.http).await?;
     } else {
+        if pin_announcement {
+            announcement.unpin(&ctx.http).await?;
+        }
+
         // send ranking message
         channel_id
             .send_message(&ctx.http, |m| {
@@ -177,9 +181,5 @@ pub async fn run_contest(
             .await?;
     }
 
-    if pin_announcement {
-        announcement.unpin(&ctx.http).await?;
-    }
-
     Ok(())
 }