refactor: replace DynamicRegistry.Key with RegistryKey across Minestom components

Updated all references from `DynamicRegistry.Key` to `RegistryKey` to align with the updated Minestom API. Adjusted relevant classes, methods, and object interactions to ensure compatibility and maintain consistency. Updated `Versions.kt` to the latest Minestom version.

buildSrc/src/main/kotlin/Versions.kt

@@ -87,6 +87,6 @@ object Versions {
     }
     
     object Minestom {
-        const val minestom = "1_21_5-4d91778331"
+        const val minestom = "1_21_5-1e8b8693ac"
     }
 }