Update changelog based on model updates

.changes/next-release/api-change-arczonalshift-35597.json

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+{
+  "type": "api-change",
+  "category": "``arc-zonal-shift``",
+  "description": "This release adds a new capability, zonal autoshift. You can configure zonal autoshift so that AWS shifts traffic for a resource away from an Availability Zone, on your behalf, when AWS determines that there is an issue that could potentially affect customers in the Availability Zone."
+}

.changes/next-release/api-change-glue-47908.json

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+{
+  "type": "api-change",
+  "category": "``glue``",
+  "description": "Adds observation and analyzer support to the GetDataQualityResult and BatchGetDataQualityResult APIs."
+}

.changes/next-release/api-change-sagemaker-69716.json

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+{
+  "type": "api-change",
+  "category": "``sagemaker``",
+  "description": "This release adds support for 1/ Code Editor, based on Code-OSS, Visual Studio Code Open Source, a new fully managed IDE option in SageMaker Studio  2/ JupyterLab, a new fully managed JupyterLab IDE experience in SageMaker Studio"
+}