Fix changelog headers

Author: asumaran

changelog.txt

@@ -1,8 +1,10 @@
 *** Changelog ***
 
+= 6.7.0 - 2022-xx-xx
+* Fix - Check payment method before updating payment method title.
+
 = 6.6.0 - 2022-08-17 =
 * Fix - Fix "Pending" text instead of numeric amount on Payment Request button on iOS.
-* Fix - Check payment method before updating payment method title.
 
 = 6.5.1 - 2022-08-01 =
 * Fix - Stripe Link missing styles and logo for email trigger button.

readme.txt

@@ -128,7 +128,7 @@ If you get stuck, you can ask for help in the Plugin Forum.
 
 == Changelog ==
 
-= 6.6.0 - 2022-08-17 =
-* Fix - Fix "Pending" text instead of numeric amount on Payment Request button on iOS.
+= 6.7.0 - 2022-xx-xx =
+* Fix - Check payment method before updating payment method title.
 
 [See changelog for all versions](https://raw.githubusercontent.com/woocommerce/woocommerce-gateway-stripe/trunk/changelog.txt).