Add release notes.

Author: selanthiraiyan

RELEASE-NOTES.txt

@@ -6,6 +6,7 @@
 - [*] Help center: Added custom help center web page with FAQs for "Enter Store Address" screen. [https://github.com/woocommerce/woocommerce-ios/pull/7553]
 - [*] In-Person Payments: The plugin selection is saved correctly after multiple onboarding prompts. [https://github.com/woocommerce/woocommerce-ios/pull/7544]
 - [*] In-Person Payments: A new prompt to enable `Pay in Person` for your store's checkout, to accept In-Person Payments for website orders [https://github.com/woocommerce/woocommerce-ios/issues/7474]
+- [*] Help center: Added custom help center web page with FAQs for "Enter WordPress.com email" screen. [https://github.com/woocommerce/woocommerce-ios/pull/7573]
 
 10.0
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