Mainnet Release 4.3.12

Mainnet Release v4.3.12

This is the latest official release of the Harmony binary recommended for validator and RPC node runner.

#4251 - [core] Fix epoch sync.
#4249 - [core] Epoch chain: update reference to head block

See release :

• https://github.com/harmony-one/harmony/releases/tag/v4.3.11
• https://github.com/harmony-one/harmony/releases/tag/v4.3.10

for feature released not made latest previously

The released version: v4.3.12-0-gf8777e0c