chore: release 0.12.7

Author: aws-sdk-kotlin-ci

.changes/0d2cc7ea-39dc-11ed-a261-0242ac120002.json

@@ -1,5 +1,17 @@
 # Changelog
 
+## [0.12.7] - 09/29/2022
+
+### Features
+* [#486](https://github.com/awslabs/aws-sdk-kotlin/issues/486) Enable configurability of the retry strategy through environment variables, system properties, and AWS profiles.
+
+### Fixes
+* Switch to a safer check to determine if all bytes have been read from an HTTP body
+* [#704](https://github.com/awslabs/aws-sdk-kotlin/issues/704) Disable throwing CancellationException in OkHttp engine's transferBody method
+
+### Miscellaneous
+* Update/clarify changelog and commit instructions in the Contributing Guidelines
+
 ## [0.12.6] - 09/19/2022
 
 ### Features

.changes/3952237f-4d07-4e81-ac73-73fb935bfd43.json

@@ -9,7 +9,7 @@ kotlin.native.ignoreDisabledTargets=true
 #kotlin.mpp.hierarchicalStructureSupport=false
 
 # SDK
-sdkVersion=0.12.7-SNAPSHOT
+sdkVersion=0.12.7
 
 # kotlin
 kotlinVersion=1.7.10