Update version to 6.29.0 (#9418)

Summary:
Update version for 6.29 release

Pull Request resolved: https://github.com/facebook/rocksdb/pull/9418

Reviewed By: riversand963

Differential Revision: D33721048

Pulled By: anand1976

fbshipit-source-id: e73602ee1c829c2e47ce6e181bca4db7cb663979

HISTORY.md

@@ -1,5 +1,6 @@
 # Rocksdb Change Log
-## Unreleased
+## 6.29.0 (01/21/2022)
+Note: The next release will be major release 7.0. See https://github.com/facebook/rocksdb/issues/9390 for more info.
 ### Public API change
 * Added values to `TraceFilterType`: `kTraceFilterIteratorSeek`, `kTraceFilterIteratorSeekForPrev`, and `kTraceFilterMultiGet`. They can be set in `TraceOptions` to filter out the operation types after which they are named.
 * Added `TraceOptions::preserve_write_order`. When enabled it  guarantees write records are traced in the same order they are logged to WAL and applied to the DB. By default it is disabled (false) to match the legacy behavior and prevent regression.

include/rocksdb/version.h

@@ -10,7 +10,7 @@
 #include "rocksdb/rocksdb_namespace.h"
 
 #define ROCKSDB_MAJOR 6
-#define ROCKSDB_MINOR 28
+#define ROCKSDB_MINOR 29
 #define ROCKSDB_PATCH 0
 
 // Do not use these. We made the mistake of declaring macros starting with