include last bug fix into 8.5.0

HISTORY.md

@@ -15,6 +15,7 @@
 
 ### Bug Fixes
 * Fix use_after_free bug in async_io MultiReads when underlying FS enabled kFSBuffer. kFSBuffer is when underlying FS pass their own buffer instead of using RocksDB scratch in FSReadRequest. Right now it's an experimental feature.
+* Fix a bug in FileTTLBooster that can cause users with a large number of levels (more than 65) to see errors like "runtime error: shift exponent .. is too large.." (#11673).
 
 ## 8.4.0 (06/26/2023)
 ### New Features

unreleased_history/bug_fixes/shifting_componeng_too_large_file_ttl_booster.md

-Fix a bug in FileTTLBooster that can cause users with a large number of levels (more than 65) to see errors like "runtime error: shift exponent .. is too large.." (#11673).
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