Update HISTORY.md for #11136 (#11177)

Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/11177

Reviewed By: cbi42

Differential Revision: D42948946

Pulled By: ajkr

fbshipit-source-id: 783d3d9007faaa036923a0364cdd0bfbd8e78062

HISTORY.md

@@ -10,6 +10,7 @@
 * Fixed some atypical behaviors for `LockWAL()` such as allowing concurrent/recursive use and not expecting `UnlockWAL()` after non-OK result. See API comments.
 * Fixed a feature interaction bug where for blobs `GetEntity` would expose the blob reference instead of the blob value.
 * Fixed `DisableManualCompaction()` and `CompactRangeOptions::canceled` to cancel compactions even when they are waiting on conflicting compactions to finish
+* Fixed a bug in which a successful `GetMergeOperands()` could transiently return `Status::MergeInProgress()`
 
 ### Feature Removal
 * Remove RocksDB Lite.