fix(one-app-dev-bundler): avoid default export of sass

[PixnBits]

Description

Use the documented import API.

Motivation

The "default" export was accidentally removed in sass@1.63.0 through 1.63.3. It will be removed in 2.x per sass/dart-sass#2008. It will likely be added back in 1.63.4 via sass/dart-sass#2009 but we can use the documented API now.

Test Conditions

Jest is not set up to use the ESM import, so the unit tests do not catch the issue. While Jest is being updated in another PR, this has been tested on my machine with a newly generated module using sass@1.63.3.

Types of changes

Check boxes that apply:

• 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 not work as expected)
• Documentation (adding or updating documentation)
• Dependency update
• Security update

Checklist

Check boxes that apply:

• My code follows the code style of this project.
• My change requires a change to the documentation and I have updated the documentation accordingly.
• These changes should be applied to a maintenance branch.
• I have added the Apache 2.0 license header to any new files created.