Enhance JSDoc description for the cleanupTaskCallback

lib/build/helpers/TaskUtil.js

@@ -163,6 +163,16 @@ class TaskUtil {
 		return this._projectBuildContext.getOption(key);
 	}
 
+	/**
+	 * Callback that will be executed once the build is finished
+	 *
+	 * @public
+	 * @callback @ui5/project/build/helpers/TaskUtil~cleanupTaskCallback
+	 * @param {boolean} force Specifies whether the cleanup callback should
+	 * 							gracefully wait for certain jobs to be completed
+	 * 							or enforce immediate termination and cleanup of those jobs.
+	 */
+
 	/**
 	 * Register a function that must be executed once the build is finished. This can be used to, for example,
 	 * clean up files temporarily created on the file system. If the callback returns a Promise, it will be waited for.
@@ -172,7 +182,8 @@ class TaskUtil {
 	 * This method is only available to custom task extensions defining
 	 * <b>Specification Version 2.2 and above</b>.
 	 *
-	 * @param {Function} callback Callback to register. If it returns a Promise, it will be waited for
+	 * @param {@ui5/project/build/helpers/TaskUtil~cleanupTaskCallback} callback Callback to register.
+	 * 			If it returns a Promise, it will be waited for
 	 * @public
 	 */
 	registerCleanupTask(callback) {