b/aws_ec2_capacity_block_reservation: add created_date attribute

[johnsonaj]

Description

Fix error while flattening.

Relations

Closes #38652

References

Output from Acceptance Testing

Best effort resource.

% make testacc TESTS=TestAccXXX PKG=ec2

...

[github-actions]

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[ewbankkit]

LGTM 🚀.

[github-actions]

This functionality has been released in v5.62.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

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[github-actions]

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