Add changelog entries from botocore

Author: aws-sdk-python-automation

.changes/next-release/api-change-apprunner-27638.json

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+{
+  "type": "api-change",
+  "category": "``apprunner``",
+  "description": "[``botocore``] This release contains several minor bug fixes."
+}

.changes/next-release/api-change-ssm-26063.json

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+{
+  "type": "api-change",
+  "category": "``ssm``",
+  "description": "[``botocore``] When \"AutoApprovable\" is true for a Change Template, then specifying --auto-approve (boolean) in Start-Change-Request-Execution will create a change request that bypasses approver review. (except for change calendar restrictions)"
+}

.changes/next-release/api-change-synthetics-20430.json

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+{
+  "type": "api-change",
+  "category": "``synthetics``",
+  "description": "[``botocore``] CloudWatch Synthetics now enables customers to choose a customer managed AWS KMS key or an Amazon S3-managed key instead of an AWS managed key (default) for the encryption of artifacts that the canary stores in Amazon S3. CloudWatch Synthetics also supports artifact S3 location updation now."
+}