Escape # in changelog

Author: rootulp

CHANGELOG.md

@@ -181,7 +181,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Improvements
 
-* [#12576](https://github.com/cosmos/cosmos-sdk/pull/12576) Remove dependency on cosmos/keyring and upgrade to 99designs/keyring v1.2.1
+* [\#12576](https://github.com/cosmos/cosmos-sdk/pull/12576) Remove dependency on cosmos/keyring and upgrade to 99designs/keyring v1.2.1
 * [\#11693](https://github.com/cosmos/cosmos-sdk/pull/11693) Add validation for gentx cmd.
 * (x/auth/vesting) [\#11652](https://github.com/cosmos/cosmos-sdk/pull/11652) Add util functions for `Period(s)`
 * [\#11630](https://github.com/cosmos/cosmos-sdk/pull/11630) Add SafeSub method to sdk.Coin.