MINOR: fix the wrong past-events link (#289)

diff --git a/25/quickstart-zookeeper.html b/25/quickstart-zookeeper.html
index 67d2ca8..d8681cd 100644
--- a/25/quickstart-zookeeper.html
+++ b/25/quickstart-zookeeper.html
@@ -267,7 +267,7 @@
         -->
         <li>
             Join a <a href="/events">local Kafka meetup group</a> and
-            <a href="/past-events">watch talks from Kafka Summit</a>,
+            <a href="https://kafka-summit.org/past-events/">watch talks from Kafka Summit</a>,
             the main conference of the Kafka community.
         </li>
     </ul>
diff --git a/26/quickstart-zookeeper.html b/26/quickstart-zookeeper.html
index e9fea43..32478d6 100644
--- a/26/quickstart-zookeeper.html
+++ b/26/quickstart-zookeeper.html
@@ -267,7 +267,7 @@
         -->
         <li>
             Join a <a href="/events">local Kafka meetup group</a> and
-            <a href="/past-events">watch talks from Kafka Summit</a>,
+            <a href="https://kafka-summit.org/past-events/">watch talks from Kafka Summit</a>,
             the main conference of the Kafka community.
         </li>
     </ul>