Update plugin description for clarity (#489)

exp_scenario/index.ts

@@ -14,7 +14,7 @@ declare module "@clusterio/lib" {
 export const plugin: lib.PluginDeclaration = {
 	name: "exp_scenario",
 	title: "exp_scenario",
-	description: "Example Description. Plugin. Change me in index.ts",
+	description: "Clusterio plugin implementing the Explosive Gaming scenario.",
 	controllerEntrypoint: "./dist/node/controller.js",
 	instanceEntrypoint: "./dist/node/instance.js",