Bump org.spigotmc:spigot-api (PotatoCraft-Studio#405)

Bumps org.spigotmc:spigot-api from 1.20.1-R0.1-SNAPSHOT to 1.20.2-R0.1-SNAPSHOT.

---
updated-dependencies:
- dependency-name: org.spigotmc:spigot-api
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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