Fixes Token-Permissions Issue Identified By Scorecard

[ware]

Proposed changes

This change simply adds the top level GitHub token permission of read for the github-ci workflow to ensure the project is following best security practices.

Types of changes

What types of changes does your code introduce to the HE Toolkit project?
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• Bugfix (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 update (if none of the other choices apply)

Checklist

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the PR. If you are unsure about any of them, do not hesitate to ask. We are
here to help! This is simply a reminder of what we are going to look for before
merging your code.

• I have read the CONTRIBUTING section
• Current formatting and unit tests / base functionality passes locally with my changes
• I have added tests that prove my fix is effective or that my feature works (if appropriate)
• I have added necessary documentation (if appropriate)
• Any dependent changes have been merged and published in downstream modules

Further comments

This is a very simple change to comply with Intel's expectations around Intel managed open source projects. Any workflows below the top level that need write access will of course need to have the permission for that specific workflow change.