Update testing instructions

Co-authored-by: Thomas Roberts <[email protected]>

Author: Tarun Vijwani

docs/internal-developers/testing/releases/990.md

@@ -121,7 +121,7 @@ Zip file for testing: [woocommerce-gutenberg-products-block.zip](https://github.
 5. Ensure no shipping rates are shown, and ensure the "Shipping" button for method selection says `calculated with an address`
 6. Enter an address (one that you have rates set up for) - as you fill in the address, be sure the rates don't populate until it's completely filled in. (address 1, city, state, country, postcode).
 7. Ensure you can change rates etc.
-8. Disable the `Hide shipping costs until an address is entered` in the editor and ensure the rates show as usual, even without a full address.
+8. Disable the `Hide shipping costs until an address is entered` in the editor and ensure the rates show as usual as soon as the country/state are entered and the rest of the address is empty. (note you should enter a country that you have rates for!).
 
 
 ### Move option to hide shipping costs until an address is entered to the Checkout block. ([8680](https://github.com/woocommerce/woocommerce-blocks/pull/8680))