Update changelog.txt

Co-authored-by: Vasily Belolapotkov <vasily.belolapotkov@automattic.com>

Author: shendy-a8c

changelog.txt

@@ -1,7 +1,7 @@
 *** Amazon Pay Changelog ***
 
 = 2.0.4 - 2021-xx-xx =
-* Fix - Interference when subcsriptions' payment changes to other payment method.
+* Fix - Interference when subcsriptions' payment method changes to other payment method.
 
 = 2.0.3 - 2021-06-15 =
 * Fix - Issues with state level handling of shipping zones.