Update dependency net.kyori:adventure-text-minimessage to v4.21.0

Author: renovate[bot]

gradle/libs.versions.toml

@@ -31,6 +31,6 @@ velocity = { module = "com.velocitypowered:velocity-api", version = "3.4.0-SNAPS
 lombok = { module = "org.projectlombok:lombok", version = "1.18.36" }
 jetbrains_annotations = { module = "org.jetbrains:annotations", version = "26.0.1" }
 luckperms = { module = "net.luckperms:api", version = "5.4" }
-kyori_minimessage = { module = "net.kyori:adventure-text-minimessage", version = "4.17.0" }
+kyori_minimessage = { module = "net.kyori:adventure-text-minimessage", version = "4.21.0" }
 kyori_adventure_fabric = { module = "net.kyori:adventure-platform-fabric", version = "5.9.0" }
 raduvoinea_utils = { module = "com.raduvoinea:utils", version = "1.1.28" }