docs: change @param wrapper -> @param maybeWrapper for Sern.init (

#360)

change `@param wrapper` -> `@param maybeWrapper` for typedoc fix

src/sern.ts

@@ -13,7 +13,7 @@ import { Client } from 'discord.js';
 
 /**
  * @since 1.0.0
- * @param wrapper Options to pass into sern.
+ * @param maybeWrapper Options to pass into sern.
  * Function to start the handler up
  * @example
  * ```ts title="src/index.ts"