(aws-bedrockagentcore): Unrecognized resource types: [AWS::BedrockAgentCore::OnlineEvaluationConfig]

### Describe the bug

Hello,

When trying to deploy a stack using a `CfnOnlineEvaluationConfig` resource, the following error shows up :
`Template format error: Unrecognized resource types: [AWS::BedrockAgentCore::OnlineEvaluationConfig]`

### Regression Issue

- [ ] Select this option if this issue appears to be a regression.

### Last Known Working CDK Library Version

2.250.0

### Expected Behavior

No error.

### Current Behavior

`diff` & `synth` commands are OK. Only `deploy` fails.

### Reproduction Steps

Just create a simple `CfnOnlineEvaluationConfig` and trigger a cdk deploy.

### Possible Solution

_No response_

### Additional Information/Context

_No response_

### AWS CDK Library version (aws-cdk-lib)

2.250.0

### AWS CDK CLI version

2.1118.2

### Node.js Version

24

### OS

Ubuntu 24

### Language

TypeScript

### Language Version

5.4.5

### Other information

_No response_

Start with the CfnOnlineEvaluationConfig resource and reproduce the issue using the reported aws-cdk-lib 2.250.0 and CDK CLI 2.1118.2 versions. Compare the successful diff and synth results with the failing deploy; done means a stack containing this resource deploys without the unrecognized resource type error.

Written by the indexing model from the issue text.