Update dependency org.bukkit:bukkit to v1.15.2-R0.1-SNAPSHOT - autoclosed

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
org.bukkit:bukkit (source)	minor	1.14.4-R0.1-SNAPSHOT -> 1.15.2-R0.1-SNAPSHOT
org.bukkit:bukkit (source)	minor	1.13.2-R0.1-SNAPSHOT -> 1.15.2-R0.1-SNAPSHOT

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