Ignore one more test after another upstream breakage

The clowns at Alpaca have managed to break yet another API. QA anyone?
Ignore the now failing test.

src/api/v2/account_activities.rs

@@ -651,6 +651,7 @@ mod tests {
 
   /// Verify that the `after` request argument is honored properly.
   #[test(tokio::test)]
+  #[ignore = "broken upstream"]
   async fn retrieve_after() {
     let api_info = ApiInfo::from_env().unwrap();
     let client = Client::new(api_info);
@@ -677,7 +678,11 @@ mod tests {
     // first one that was reported.
     let activities = client.issue::<Get>(&request).await.unwrap();
     assert_eq!(activities.len(), 1);
-    assert!(activities[0].time() > time);
+    assert!(
+      activities[0].time() > time,
+      "{} vs {time}",
+      activities[0].time()
+    );
   }
 
   /// Verify that the `until` request argument is honored properly.