chore: update workflows to use sha instead of ref

[gracelu0]

Issue # (if applicable)

n/a

Reason for this change

To adhere to best security practices

Description of changes

Update workflows to use sha instead of ref

Describe any new or updated permissions being added

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.00%. Comparing base (29d1945) to head (7b38164).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #33442   +/-   ##
=======================================
  Coverage   81.00%   81.00%           
=======================================
  Files         238      238           
  Lines       14269    14269           
  Branches     2492     2492           
=======================================
  Hits        11558    11558           
  Misses       2425     2425           
  Partials      286      286           

Flag	Coverage Δ
suite.unit	81.00% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
packages/aws-cdk	79.92% <ø> (ø)
packages/aws-cdk-lib/core	82.16% <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).

[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).

[aaythapa]

@mergify update

[mergify]

update

☑️ Nothing to do

• queue-position = -1 [📌 update requirement]
• #commits-behind > 0 [📌 update requirement]
• -closed [📌 update requirement]
• -conflict [📌 update requirement]

[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: 7b38164
• Result: SUCCEEDED
• Build Logs (available for 30 days)

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[github-actions]

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