Fix ping stale reviewers on subsequent reviews

Author: jablko

src/compute-pr-actions.ts

@@ -3,7 +3,7 @@ import * as urls from "./urls";
 import { PrInfo, BotNotFail, FileInfo } from "./pr-info";
 import { CIResult } from "./util/CIResult";
 import { ReviewInfo } from "./pr-info";
-import { noNullish, flatten, unique, sameUser, daysSince, min, sha256, abbrOid } from "./util/util";
+import { noNullish, flatten, unique, sameUser, daysSince, max, sha256, abbrOid } from "./util/util";
 
 type ColumnName =
     | "Needs Maintainer Action"
@@ -350,7 +350,7 @@ export function process(prInfo: BotNotFail,
         }
         // Ping stale reviewers if any
         if (info.staleReviews.length > 0) {
-            const { abbrOid } = min(info.staleReviews, (l, r) => +l.date - +r.date)!;
+            const { abbrOid } = max(info.staleReviews, (l, r) => +l.date - +r.date)!;
             const reviewers = info.staleReviews.map(r => r.reviewer);
             post(Comments.PingStaleReviewer(abbrOid, reviewers));
         }