15.3.0-beta for Fabric on Minecraft 1.20.1

This release optimizes channel computation. There is no network "booting" delay anymore: channels are recomputed and network devices become operational near-instantly. Released as a beta for now. Please let us know if you notice bugs in the new channel computation algorithm.

• Optimize channel computation by @Technici4n in #8285

Full Changelog: fabric/v15.2.14...fabric/v15.3.0-beta