docs(elasticloadbalancingv2): add comment to recommended policy.

[KuramaeNaputo]

Issue # (if applicable)

Closes #32307 .

Reason for this change

Enum SslPolicy doesn't have a TLS13_12.
When I try to add, it was failed caused by the value conflicts with the exiting value RECOMMENDED_TLS.
But User will be confused. So I add a comment.

#32377 (comment)

Description of changes

add comment to doc.

Description of how you validated changes

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[KuramaeNaputo]

@Mergifyio update

[mergify]

update

✅ Branch has been successfully updated

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: b1dd411
• Result: SUCCEEDED
• Build Logs (available for 30 days)

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[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.67%. Comparing base (c78ef1b) to head (b1dd411).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #32379      +/-   ##
==========================================
+ Coverage   78.66%   78.67%   +0.01%     
==========================================
  Files         107      107              
  Lines        7237     7237              
  Branches     1329     1329              
==========================================
+ Hits         5693     5694       +1     
+ Misses       1358     1357       -1     
  Partials      186      186              

Flag	Coverage Δ
suite.unit	78.67% <ø> (+0.01%)	⬆️

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Components	Coverage Δ
packages/aws-cdk	78.67% <ø> (+0.01%)	⬆️

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