chore(deps): Update dependency net.essentialsx:EssentialsXDiscord to v2.21.1

Author: renovate[bot]

gradle/libs.versions.toml

@@ -42,7 +42,7 @@ fabricApi = "0.115.6+1.21.1"
 fabricPermissionsApi = "0.3.1"
 adventurePlatformFabric = "5.14.2"
 luckPermsApi = "5.4"
-essentialsx = "2.20.1"
+essentialsx = "2.21.1"
 discordsrv = "1.28.1"
 placeholderapi = "2.11.6"
 miniplaceholders = "2.3.0"