docs: add missing changelog

changes/ee/fix-14291.en.md

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+Upgraded Pulsar producer driver to fix handling of `Redirect` `LookupType` responses when looking up a topic in Pulsar.
+
+Before this fix, if the `LookupType` response type was `Redirect` when (re)starting a producer, it would incorrectly attempt to connect to the returned broker and fail to publish any messages.  Example logs under such condition:
+
+```
+2024-11-25T20:40:54.140659+00:00 [error] [pulsar-producer][persistent://public/default/p3-partition-0] Response error:'ServiceNotReady', msg:"Namespace bundle for topic (persistent://public/default/p3-partition-0) not served by this instance. Please redo the lookup. Request is denied: namespace=public/default"
+```