chore: add changelog entry

changes/ee/fix-14004.en.md

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+Fix an issue with Cluster Linking where having overlapping topic filters in `topics` configuration would lead to inconsistent and incomplete cross-cluster message routing. Each topic filter is respected now, but overlapping filters may lead to increased cross-cluster routing complexity.
+
+## Breaking changes
+
+Redundant topic filters (e.g. `t/1` and `t/+`) in the `topics` configuration are now considered invalid. The link will fail to start if such configuration is detected.