Update dependency com.sk89q.worldguard:worldguard-bukkit to v7.0.18

Author: renovate[bot]

gradle/libs.versions.toml

@@ -9,7 +9,7 @@ snakeyaml = "2.2"
 
 # Plugins
 dummypermscompat = "1.10"
-worldguard-bukkit = "7.0.17"
+worldguard-bukkit = "7.0.18"
 griefprevention = "18.0.0"
 griefdefender = "2.1.0-SNAPSHOT"
 residence = "6.0.2.3"