Minor PR change for grammer

vkochovski · vkochovski · commit 6137ccac3186 · 2022-04-04T11:41:27.000+02:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
 
 ### Changes
 
-- Add new method in Subscription that changes the existing subscription plan. The change can either a downgrade or an upgrade.
+- Add new method in Subscription that changes the existing subscription plan. The change can either be a downgrade or an upgrade.
 
 # [3.12.4] - 03-17-2022
 
