mainnet v1.51.4 release

[eug...@mystenlabs.com]

The next Sui v1.51.4 upgrade for mainnet is now available. The protocol version in this release is 87 that could be applied as early as tomorrow at epoch change if 83.4% of validators by stake have upgraded. Thank you!

Branch: mainnet
Commit: 2d59098e6fff15618f305591f3aa2a4661a32c90
Tag: mainnet-v1.51.4
Release Notes: https://github.com/MystenLabs/sui/releases/tag/mainnet-v1.51.4. DockerHub is experiencing issues with tagging images. See https://www.dockerstatus.com. Once the incident is resolved, we’ll update the tags. Sorry for any inconvenience.