Update syntax highlighting in WorldBorder.md

community/WorldBorder.md

@@ -16,7 +16,7 @@ Go to your BlueMap config directory, and open the `maps` folder.
 In there, you will find a `.conf` file for each of your maps.
 Open the file that corresponds to the world that you want to add a world border to, and scroll to the bottom, until the `marker-sets` section.
 Copy this snippet into there, and adapt it to your liking:
-```json
+```hocon
 marker-sets: {
 	world-borders: {
 		label: "World Borders"