add breaking API upgrade warning to the ChangeLog

CHANGELOG.md

@@ -11,6 +11,8 @@
 
 - This Lotus release includes some correctness improvements to the events subsystem, impacting RPC APIs including `GetActorEventsRaw`, `SubscribeActorEventsRaw`, `eth_getLogs` and the `eth` filter APIs. Part of these improvements involve an events database migration that may take some time to complete on nodes with extensive event databases. See [filecoin-project/lotus#12080](https://github.com/filecoin-project/lotus/pull/12080) for details.
 
+- Breaking change in public APIs `storage/pipeline.NewPreCommitBatcher` and `storage/pipeline.New`. They now have an additional error return to deal with errors arising from fetching the sealing config.
+
 ## New features
 
 - feat: Add trace transaction API supporting RPC method `trace_transaction` ([filecoin-project/lotus#12068](https://github.com/filecoin-project/lotus/pull/12068))