Fix DynamoDB CDC S3 example startup failure in integration workflow

[Copilot]

Integration Tests - dynamodb_cdc failed because to-s3.yaml initialized aws_s3 with an invalid empty canned ACL. This change makes the S3 output config explicitly valid so the example pipeline can start under current Redpanda Connect validation.

• Root cause

  • aws_s3 output rejected an empty object_canned_acl value during pipeline initialization.

• Change

  • Updated modules/cookbooks/examples/dynamodb_cdc/to-s3.yaml to set a valid canned ACL:
    • object_canned_acl: private

• Why this is scoped

  • Single-line config correction in the failing example; no behavior changes outside the DynamoDB CDC to-s3 cookbook path.

output:
  aws_s3:
    bucket: ${S3_BUCKET}
    path: dynamodb-cdc/${DYNAMODB_TABLE}/${! @s3_path }/${! uuid_v4() }.json
    region: ${AWS_REGION}
    object_canned_acl: private

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