Finish converting all events to jspecify annotations

patches/api/Entity-Jump-API.patch

@@ -41,10 +41,12 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        return (LivingEntity) super.getEntity();
 +    }
 +
++    @Override
 +    public boolean isCancelled() {
 +        return this.cancelled;
 +    }
 +
++    @Override
 +    public void setCancelled(final boolean cancel) {
 +        this.cancelled = cancel;
 +    }