chore: add change log

changes/ce/fix-12598.en.md

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+Fixed an issue that unable to subscribe or unsubscribe a shared topic filter via HTTP API.
+
+Releated APIs:
+
+- `/clients/:clientid/subscribe`
+- `/clients/:clientid/subscribe/bulk`
+
+- `/clients/:clientid/unsubscribe`
+- `/clients/:clientid/unsubscribe/bulk`