Move WaitForCompect() change entry to Unreleased in History file (#11479)

Summary:
Context:

Because of the branch cut, History change made it to the previous release. Moving entry to Unreleased

Pull Request resolved: https://github.com/facebook/rocksdb/pull/11479

Test Plan: History change. Not needed.

Reviewed By: pdillinger

Differential Revision: D46226237

Pulled By: jaykorean

fbshipit-source-id: 33e7d84a05db254d227f05d76038fc6d225dbabf

HISTORY.md

@@ -3,6 +3,9 @@
 ### New Features
 * Add a new option OptimisticTransactionDBOptions::shared_lock_buckets that enables sharing mutexes for validating transactions between DB instances, for better balancing memory efficiency and validation contention across DB instances. Different column families and DBs also now use different hash seeds in this validation, so that the same set of key names will not contend across DBs or column families.
 
+### Public API Changes
+* Add `WaitForCompact()` to wait for all flush and compactions jobs to finish. Jobs to wait include the unscheduled (queued, but not scheduled yet).
+
 ### Behavior changes
 * Statistics `rocksdb.sst.read.micros` scope is expanded to all SST reads except for file ingestion and column family import (some compaction reads were previously excluded).
 
@@ -20,7 +23,6 @@
 * EXPERIMENTAL: Add new API `DB::ClipColumnFamily` to clip the key in CF to a certain range. It will physically deletes all keys outside the range including tombstones.
 * Add `MakeSharedCache()` construction functions to various cache Options objects, and deprecated the `NewWhateverCache()` functions with long parameter lists.
 * Changed the meaning of various Bloom filter stats (prefix vs. whole key), with iterator-related filtering only being tracked in the new \*`_LEVEL_SEEK_`\*. stats. (#11460)
-* Add `WaitForCompact()` to wait for all flush and compactions jobs to finish. Jobs to wait include the unscheduled (queued, but not scheduled yet).
 
 ### Behavior changes
 * For x86, CPU features are no longer detected at runtime nor in build scripts, but in source code using common preprocessor defines. This will likely unlock some small performance improvements on some newer hardware, but could hurt performance of the kCRC32c checksum, which is no longer the default, on some "portable" builds. See PR #11419 for details.