Update changelog based on model updates

Author: aws-sdk-python-automation

.changes/next-release/api-change-bedrock-38467.json

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+{
+  "type": "api-change",
+  "category": "``bedrock``",
+  "description": "Automated Reasoning checks in Amazon Bedrock Guardrails is capable of generating policy scenarios to validate policies. The GetAutomatedReasoningPolicyBuildWorkflowResultAssets API now adds POLICY SCENARIO asset type, allowing customers to retrieve scenarios generated by the build workflow."
+}

.changes/next-release/api-change-billingconductor-96441.json

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+{
+  "type": "api-change",
+  "category": "``billingconductor``",
+  "description": "Launch itemized custom line item and service line item filter"
+}

.changes/next-release/api-change-cloudwatch-4200.json

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+{
+  "type": "api-change",
+  "category": "``cloudwatch``",
+  "description": "This release introduces two additional protocols AWS JSON 1.1 and Smithy RPC v2 CBOR, replacing the currently utilized one, AWSQuery. AWS SDKs will prioritize the protocol that is the most performant for each language."
+}

.changes/next-release/api-change-odb-87373.json

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+{
+  "type": "api-change",
+  "category": "``odb``",
+  "description": "The following APIs now return CloudExadataInfrastructureArn and OdbNetworkArn fields for improved resource identification and AWS service integration - GetCloudVmCluster, ListCloudVmClusters, GetCloudAutonomousVmCluster, and ListCloudAutonomousVmClusters."
+}

.changes/next-release/api-change-opensearch-50446.json

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+{
+  "type": "api-change",
+  "category": "``opensearch``",
+  "description": "The CreateApplication API now supports an optional kms key arn parameter to allow customers to specify a CMK for application encryption."
+}

.changes/next-release/api-change-partnercentralselling-29590.json

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+{
+  "type": "api-change",
+  "category": "``partnercentral-selling``",
+  "description": "Adds support for the new Project.AwsPartition field on Opportunity and AWS Opportunity Summary. Use this field to specify the AWS partition where the opportunity will be deployed."
+}

.changes/next-release/api-change-signer-63869.json

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+{
+  "type": "api-change",
+  "category": "``signer``",
+  "description": "Adds support for Signer GetRevocationStatus with updated endpoints"
+}