fix: Buffer deprecation warning

[tim-lai]

Description

Replace new Buffer() with Buffer.from()

ref: https://nodejs.org/fa/docs/guides/buffer-constructor-deprecation/

Motivation and Context

PR #1500 introduced new tests that used new Buffer(), which was not captured in the review.

DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead

How Has This Been Tested?

deprecation warnings no longer present in test result

Screenshots (if appropriate):

Types of changes

• No code changes (changes to documentation, CI, metadata, etc)
• Dependency changes (any modification to dependencies in package.json)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.