Update changelog

doc/CHANGES.md

@@ -2,6 +2,7 @@
 
 ## Highlighted Features
 
+* Migrated from Stripe Plans to Stripe Prices (Graeme Porteous)
 * Upgrade Stripe API version (Graeme Porteous)
 * Fix script/mailin when multiple EXCEPTION_NOTIFICATIONS_TO addresses are
   specified (Graeme Porteous)
@@ -88,7 +89,6 @@
 * Don't show users that have closed their account or been banned on leaderboards
   (Chris Mytton)
 
-
 ## Upgrade Notes
 
 * _Required:_ This upgrade requires upgrading Ruby from 3.0 to 3.1 or later.
@@ -132,6 +132,13 @@
   version from `2017-01-27` to `2020-03-02`. No changes should be necessary to
   your Stripe account.
 
+* _Optional:_ We have moved from Stripe Plans to Stripe Prices. Previously we
+  hardcoded the Stripe Plan ID of `pro`, but with changes to the Stripe
+  dashboard this ID can no longer be created. Migration to the Prices API will
+  allow for more flexibly, pricing changes, and multiple price points - for
+  example annual pricing. For new prices you need to configure `STRIPE_PRICES`
+  in `config/general.yml`.
+
 # 0.44.0.1
 
 ## Highlighted Features