Add changelog entries from botocore

.changes/next-release/api-change-chimesdkvoice-52721.json

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+{
+  "type": "api-change",
+  "category": "``chime-sdk-voice``",
+  "description": "[``botocore``] Documentation-only update that clarifies the ValidateE911Address action of the Amazon Chime SDK Voice APIs."
+}

.changes/next-release/api-change-cognitoidentity-6553.json

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+{
+  "type": "api-change",
+  "category": "``cognito-identity``",
+  "description": "[``botocore``] This release adds sensitive trait to some required shapes."
+}

.changes/next-release/api-change-pipes-47516.json

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+{
+  "type": "api-change",
+  "category": "``pipes``",
+  "description": "[``botocore``] This release adds support for customer managed KMS keys in Amazon EventBridge Pipe"
+}

.changes/next-release/api-change-securityhub-92936.json

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+{
+  "type": "api-change",
+  "category": "``securityhub``",
+  "description": "[``botocore``] Documentation update for Security Hub"
+}

.changes/next-release/enhancement-AWSCRT-51664.json

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+{
+  "type": "enhancement",
+  "category": "AWSCRT",
+  "description": "[``botocore``] Update awscrt version to 0.21.5"
+}

.changes/next-release/enhancement-s3-94466.json

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+{
+  "type": "enhancement",
+  "category": "``s3``",
+  "description": "[``botocore``] Adds logic to gracefully handle invalid timestamps returned in the Expires header."
+}