Update CHANGELOG.md

Author: asmyasnikov

CHANGELOG.md

@@ -3,7 +3,6 @@
 * Marked as deprecated `options.WithQueryCachePolicyKeepInCache` and `options.WithQueryCachePolicy` options
 * Added `options.WithKeepInCache` option
 * Enabled by default keep-in-cache policy for data queries
-* Fixed bug with convertation `time.Duration` from/to YDB value
 * Removed from `ydb.Connection` embedding of `grpc.ClientConnInterface`
 * Fixed stopping of repeater
 * Added log backoff between force repeater wake up's (from 500ms to 32s)