RatOS 2.1.0-RC4 released!

[tg73]

• Major improvements to beacon workflow and first layer accuracy and reliability.
• Plus support for the new Rat Rig V-Core 4. printer and upgrades.
• A fresh installation is required - existing 2.1.0-RC3 installations will not be updated automatically.
• See the ⁨release notes⁩ for more information:
• https://github.com/Rat-OS/RatOS/releases/tag/v2.1.0-RC4
• https://ratrig.com/collections/v-core-4