[CI-SKIP] Clarify Event#callEvent() JavaDoc (#1158)

Spigot-API-Patches/0024-Add-a-call-helper-to-Event.patch

@@ -24,7 +24,7 @@ index 6677e1b..eaf6c49 100644
 +    /**
 +     * Calls the event and tests if cancelled.
 +     *
-+     * @return if event was cancelled, if cancellable. otherwise true.
++     * @return false if event was cancelled, if cancellable. otherwise true.
 +     */
 +    public boolean callEvent() {
 +        Bukkit.getPluginManager().callEvent(this);