chore: update dependency net.minestom:minestom to v2025.08.18-1.21.8

Author: renovate[bot]

gradle/libs.versions.toml

@@ -61,7 +61,7 @@ sponge = "9.0.0"
 velocity = "3.4.0-SNAPSHOT"
 waterdogpe = "1.2.4"
 nukkitX = "1.0-SNAPSHOT"
-minestom = "2025.08.12-1.21.8"
+minestom = "2025.08.18-1.21.8"
 minestomExtensions = "1.2.0"
 spigot = "1.8.8-R0.1-SNAPSHOT"
 bungeecord = "1.21-R0.4-SNAPSHOT"