Update changelog based on model updates

.changes/next-release/api-change-ec2-15470.json

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+{
+  "type": "api-change",
+  "category": "``ec2``",
+  "description": "Amazon EC2 M7a instances, powered by 4th generation AMD EPYC processors, deliver up to 50% higher performance compared to M6a instances. Amazon EC2 Hpc7a instances, powered by 4th Gen AMD EPYC processors, deliver up to 2.5x better performance compared to Amazon EC2 Hpc6a instances."
+}

.changes/next-release/api-change-glue-69358.json

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+{
+  "type": "api-change",
+  "category": "``glue``",
+  "description": "Added API attributes that help in the monitoring of sessions."
+}

.changes/next-release/api-change-mediaconvert-16649.json

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+{
+  "type": "api-change",
+  "category": "``mediaconvert``",
+  "description": "This release includes additional audio channel tags in Quicktime outputs, support for film grain synthesis for AV1 outputs, ability to create audio-only FLAC outputs, and ability to specify Amazon S3 destination storage class."
+}

.changes/next-release/api-change-medialive-31984.json

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+{
+  "type": "api-change",
+  "category": "``medialive``",
+  "description": "MediaLive now supports passthrough of KLV data to a HLS output group with a TS container. MediaLive now supports setting an attenuation mode for AC3 audio when the coding mode is 3/2 LFE. MediaLive now supports specifying whether to include filler NAL units in RTMP output group settings."
+}

.changes/next-release/api-change-mediatailor-15067.json

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+{
+  "type": "api-change",
+  "category": "``mediatailor``",
+  "description": "Adds new source location AUTODETECT_SIGV4 access type."
+}

.changes/next-release/api-change-quicksight-51287.json

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+{
+  "type": "api-change",
+  "category": "``quicksight``",
+  "description": "Excel support in Snapshot Export APIs. Removed Required trait for some insight Computations. Namespace-shared Folders support. Global Filters support. Table pin Column support."
+}

.changes/next-release/api-change-rds-39402.json

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+{
+  "type": "api-change",
+  "category": "``rds``",
+  "description": "This release updates the supported versions for Percona XtraBackup in Aurora MySQL."
+}

.changes/next-release/api-change-s3control-64925.json

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+{
+  "type": "api-change",
+  "category": "``s3control``",
+  "description": "Updates to endpoint ruleset tests to address Smithy validation issues and standardize the capitalization of DualStack."
+}

.changes/next-release/api-change-verifiedpermissions-14005.json

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+{
+  "type": "api-change",
+  "category": "``verifiedpermissions``",
+  "description": "Documentation updates for Amazon Verified Permissions."
+}