Prevent creation of new branches by validating branch selection

[elchananarb]

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Description

Describe the purpose of this PR along with any background information and the impacts of the proposed change.

References

Include supporting link to GitHub Issue/PR number

Testing

Describe how this change was tested. Be specific about anything not tested and reasons why. If this solution has unit and/or integration testing, tests should be added for new functionality and existing tests should complete without errors.

Please include any manual steps for testing end-to-end or functionality not covered by unit/integration tests.

Checklist

• I have added documentation for new/changed functionality in this PR (if applicable).
• All active GitHub checks for tests, formatting, and security are passing
• The correct base branch is being used

[github-actions]

Checkmarx One – Scan Summary & Details – b9ae30f7-4a73-4a95-8f4a-b5e324c575fa

Great job, no security vulnerabilities found in this Pull Request