CHANGELOG.md in aws-sdk-ec2-1.265.0 vs CHANGELOG.md in aws-sdk-ec2-1.266.0

@@ -1,7 +1,12 @@
 Unreleased Changes
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+1.266.0 (2021-10-05)
+------------------
+
+* Feature - Released Capacity Reservation Fleet, a feature of Amazon EC2 Capacity Reservations, which provides a way to manage reserved capacity across instance types. For more information: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/cr-fleets.html
+
 1.265.0 (2021-09-24)
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 * Feature - DescribeInstances now returns Platform Details, Usage Operation, and Usage Operation Update Time.
 
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