update release date

Author: haszari

readme.txt

@@ -85,7 +85,7 @@ Release and roadmap notes available on the [WooCommerce Developers Blog](https:/
 
 == Changelog ==
 
-= 3.3.0 - 2020-08-31 =
+= 3.3.0 - 2020-09-02 =
 - enhancement: Show express payment methods in the Cart block (for example: Apple Pay, Chrome Pay). [3004](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/3004)
 - bug: Fix alignment of discounted prices in Cart block. [3047](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/3047)
 - bug: Fix an issue with products sold individually (max of 1 per cart); the Checkout block now shows a notice if shopper attempts to add another instance of product via an `add-to-cart` link. [2854](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/2854)