Add changelog entries from botocore

.changes/next-release/api-change-ce-68312.json

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+{
+  "type": "api-change",
+  "category": "``ce``",
+  "description": "[``botocore``] This release adds the LastUpdatedDate and LastUsedDate timestamps to help you manage your cost allocation tags."
+}

.changes/next-release/api-change-globalaccelerator-46938.json

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+{
+  "type": "api-change",
+  "category": "``globalaccelerator``",
+  "description": "[``botocore``] Global Accelerator now supports Client Ip Preservation for Network Load Balancer endpoints."
+}

.changes/next-release/api-change-rds-13508.json

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+{
+  "type": "api-change",
+  "category": "``rds``",
+  "description": "[``botocore``] Adding parameters to CreateCustomDbEngineVersion reserved for future use."
+}

.changes/next-release/api-change-verifiedpermissions-64451.json

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+{
+  "type": "api-change",
+  "category": "``verifiedpermissions``",
+  "description": "[``botocore``] Documentation updates for Amazon Verified Permissions. Increases max results per page for ListPolicyStores, ListPolicies, and ListPolicyTemplates APIs from 20 to 50."
+}