docs: add changelog

changes/ce/fix-14319.en.md

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+Refactored resource management internal state machine.  As consequence, some race condition bugs have been eliminated.  One such example is the HTTP action, which, when under incoming traffic and when its health check flap, may produce errors like the following:
+
+```
+2024-11-29T14:58:17.994119+00:00 [error] msg: action_not_found, connector: <<"connector:http:a">>, action_id: <<"action:http:a:connector:http:a">>
+```