Add changelog entries from botocore

.changes/next-release/api-change-autoscaling-15587.json

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+{
+  "type": "api-change",
+  "category": "``autoscaling``",
+  "description": "[``botocore``] Documentation changes related to Amazon EC2 Auto Scaling APIs."
+}

.changes/next-release/api-change-cloud9-323.json

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+{
+  "type": "api-change",
+  "category": "``cloud9``",
+  "description": "[``botocore``] Updated the deprecation date for Amazon Linux. Doc only update."
+}

.changes/next-release/api-change-dms-27606.json

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+{
+  "type": "api-change",
+  "category": "``dms``",
+  "description": "[``botocore``] The release makes public API for DMS Schema Conversion feature."
+}

.changes/next-release/api-change-ec2-5164.json

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+{
+  "type": "api-change",
+  "category": "``ec2``",
+  "description": "[``botocore``] This release adds new parameter isPrimaryIPv6 to  allow assigning an IPv6 address as a primary IPv6 address to a network interface which cannot be changed to give equivalent functionality available for network interfaces with primary IPv4 address."
+}

.changes/next-release/api-change-sagemaker-86292.json

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+{
+  "type": "api-change",
+  "category": "``sagemaker``",
+  "description": "[``botocore``] Amazon SageMaker now supports running training jobs on p5.48xlarge instance types."
+}