chore: fix yarn upgrade workflow

[GavinZZ]

Reason for this change

Fix failed workflow yarn upgrade https://github.com/aws/aws-cdk/actions/runs/13445238910/job/37568949091

Since CLI is moved out, there is no packages/aws-cdk dir.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.17%. Comparing base (93a3348) to head (901b3f6).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #33533   +/-   ##
=======================================
  Coverage   82.17%   82.17%           
=======================================
  Files         119      119           
  Lines        6862     6862           
  Branches     1158     1158           
=======================================
  Hits         5639     5639           
  Misses       1120     1120           
  Partials      103      103           

Flag	Coverage Δ
suite.unit	82.17% <ø> (ø)

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Components	Coverage Δ
packages/aws-cdk	∅ <ø> (∅)
packages/aws-cdk-lib/core	82.17% <ø> (ø)

[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).

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 901b3f6
• 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).

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