doc: announce single-event enqueue/dequeue ABI change

Announce the removal of the single-event enqueue and dequeue
operations from the eventdev ABI.

Signed-off-by: Mattias Rönnblom <mattias.ronnblom@ericsson.com>
Signed-off-by: 0-day Robot <robot@bytheb.org>

doc/guides/rel_notes/deprecation.rst

@@ -153,3 +153,11 @@ Deprecation Notices
   The new port library API (functions rte_swx_port_*)
   will gradually transition from experimental to stable status
   starting with DPDK 23.07 release.
+
+* eventdev: The single-event (non-burst) enqueue and dequeue
+  operations, used by static inline burst enqueue and dequeue
+  functions in <rte_eventdev.h>, will be removed in DPDK 23.11. This
+  simplification includes changing the layout and potentially also the
+  size of the public rte_event_fp_ops struct, breaking the ABI. Since
+  these functions are not called directly by the application, the API
+  remains unaffected.