Update pod.md (#15301)

fixed broken link

content/en/docs/concepts/workloads/pods/pod.md

@@ -154,7 +154,7 @@ and rollout management.
 Controllers like [StatefulSet](/docs/concepts/workloads/controllers/statefulset.md)
 can also provide support to stateful Pods.
 
-The use of collective APIs as the primary user-facing primitive is relatively common among cluster scheduling systems, including [Borg](https://research.google.com/pubs/pub43438.html), [Marathon](https://mesosphere.github.io/marathon/docs/rest-api.html), [Aurora](http://aurora.apache.org/documentation/latest/reference/configuration/#job-schema), and [Tupperware](http://www.slideshare.net/Docker/aravindnarayanan-facebook140613153626phpapp02-37588997).
+The use of collective APIs as the primary user-facing primitive is relatively common among cluster scheduling systems, including [Borg](https://research.google.com/pubs/pub43438.html), [Marathon](https://mesosphere.github.io/marathon/docs/rest-api.html), [Aurora](http://aurora.apache.org/documentation/latest/reference/configuration/#job-schema), and [Tupperware](https://www.slideshare.net/Docker/aravindnarayanan-facebook140613153626phpapp02-37588997).
 
 Pod is exposed as a primitive in order to facilitate: