Update rds_cluster_endpoint.html.markdown

[rama280290]

Description
Enhance the aws_rds_cluster_endpoint documentation (https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/rds_cluster_endpoint) by indicating that this resource is related to Aurora custom endpoints

Relations
Closes #37183

References
https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/rds_cluster_endpoint

[github-actions]

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[github-actions]

Hey @rama280290 👋 Thank you very much for your contribution! At times, our maintainers need to make direct edits to pull requests in order to help get it ready to be merged. Your current settings do not allow maintainers to make such edits. To help facilitate this, update your pull request to allow such edits as described in GitHub's Allowing changes to a pull request branch created from a fork documentation. (If you're using a fork owned by an organization, your organization may not allow you to change this setting. If that is the case, let us know.)

[ewbankkit]

LGTM 🚀.

[ewbankkit]

@rama280290 Thanks for the contribution 🎉 👏.

[github-actions]

This functionality has been released in v5.56.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!