Add changelog entries from botocore

.changes/next-release/api-change-account-94391.json

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+{
+  "type": "api-change",
+  "category": "``account``",
+  "description": "[``botocore``] This release of the Account Management API enables customers to view and manage whether AWS Opt-In Regions are enabled or disabled for their Account. For more information, see https://docs.aws.amazon.com/accounts/latest/reference/manage-acct-regions.html"
+}

.changes/next-release/api-change-appconfigdata-93308.json

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+{
+  "type": "api-change",
+  "category": "``appconfigdata``",
+  "description": "[``botocore``] AWS AppConfig now offers the option to set a version label on hosted configuration versions. If a labeled hosted configuration version is deployed, its version label is available in the GetLatestConfiguration response."
+}

.changes/next-release/api-change-snowball-98092.json

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+{
+  "type": "api-change",
+  "category": "``snowball``",
+  "description": "[``botocore``] Adds support for EKS Anywhere on Snowball. AWS Snow Family customers can now install EKS Anywhere service on Snowball Edge Compute Optimized devices."
+}