Update readme.txt with 4.5.0 release changelog

Author: opr

readme.txt

@@ -85,6 +85,30 @@ Release and roadmap notes available on the [WooCommerce Developers Blog](https:/
 
 == Changelog ==
 
+= 4.5.0 - 2021-02-15 =
+
+#### Enhancements
+
+- Login links on the checkout should use the account page. ([3844](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/3844))
+- Prevent checkout linking to trashed terms and policy pages. ([3843](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/3843))
+- Improved nonce logic by moving nonces to cart routes only. ([3812](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/3812))
+- If coupons become invalid between applying to a cart and checking out, show the user a notice when the order is placed. ([3810](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/3810))
+- Improve design of cart and checkout sidebars. ([3797](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/3797))
+- Improve error displayed to customers when an item's stock status changes during checkout. ([3703](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/3703))
+- Dev - Block Checkout will now respect custom address locales and custom country states via core filter hooks. ([3662](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/3662))
+- Update checkout block payment methods UI. ([3439](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/3439))
+
+#### Bug Fixes
+
+- Fix JS warning if two cart products share the same name. ([3814](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/3814))
+- Align place order button to the right of the block. ([3803](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/3803))
+- Ensure special characters are displayed properly in the Cart sidebar. ([3721](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/3721))
+
+#### Documentation
+
+- Improvements to experimental interfaces documentation. ([3785](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/3785))
+
+
 = 4.4.0 - 2021-02-02 =
 
 #### Enhancements