CHANGELOG: add 0.32.12 changelog entry (#4918)

CHANGELOG.md

@@ -395,6 +395,14 @@ subjectivity interface. Refer to the [spec](https://github.com/tendermint/spec/b
 - [consensus/types] [\#4243](https://github.com/tendermint/tendermint/issues/4243) fix BenchmarkRoundStateDeepCopy panics (@cuonglm)
 - [rpc] [\#4256](https://github.com/tendermint/tendermint/issues/4256) Pass `outCapacity` to `eventBus#Subscribe` when subscribing using a local client
 
+## v0.32.12
+
+*May 19, 2020*
+
+### BUG FIXES
+
+- [p2p] [\#4847](https://github.com/tendermint/tendermint/pull/4847) Return masked IP (not the actual IP) in addrbook#groupKey (@melekes)
+
 ## v0.32.11
 
 ### BUG FIXES: