Update changelog

Signed-off-by: Silas Davis <[email protected]>

CHANGELOG.md

@@ -11,6 +11,7 @@
 ### Fixed
 - TxExecutions that were exceptions (for example those that were REVERTed) will no longer have their events emitted from ExecutionEventsServer.GetEvents. They remain stored in state for the time being.
 - CallTxSim and CallCodeSim now take same code path as real transactions (via CallContext)
+- Release our mempool signing lock once transactions have been CheckTx'd' to massively increase throughput.
 
 ### Added
 - Upgraded to Tendermint [0.22.8](https://github.com/tendermint/tendermint/compare/v0.22.4...v0.22.8) (from 0.22.4).
@@ -22,10 +23,6 @@
 - Exposed Tendermint SeedMode option
 
 
-### Fixed
-- Release our mempool signing lock once transactions have been CheckTx'd' to massively increase throughput.
-
-
 ## [0.20.0] - 2018-07-24
 This is a major (pre-1.0.0) release that introduces the ability to change the validator set through GovTx, transaction execution history, and fuller GRPC endpoint.