Update dependency eu.cloudnetservice.cloudnet:bom to v4.0.0-RC15-SNAPSHOT

Author: renovate[bot]

settings.gradle.kts

@@ -37,7 +37,7 @@ dependencyResolutionManagement {
 
             library("mycelium.bom", "net.onelitefeather", "mycelium-bom").versionRef("bom")
             library("aonyx.bom", "net.onelitefeather", "aonyx-bom").versionRef("aonyx")
-            version("cloudnet", "4.0.0-RC14")
+            version("cloudnet", "4.0.0-RC15-SNAPSHOT")
 
             library("pvp", "com.github.TogAr2", "MinestomPvP").versionRef("pvp")
             library("minestom", "net.minestom", "minestom").withoutVersion()