fix: Issue#245 Leading and trailing underscores prevent the integration from recognizing valid rally artifacts

[omendrapandey]

Bug Link : [Leading and trailing underscores prevent the integration from recognizing valid rally artifacts](https://github.com/github/rally/issues/425) Fixes # Replacing special character so that it can be captured by Rally API

Proposed Changes

-Fix to accommodate validation for rally artifacts validation in PR with Leading and trailing underscores

Readiness Checklist

• [ ] If this change requires documentation, it has been included in this pull request

Reviewer Checklist

• [x] If a functional change has occurred, testing the integration has been performed
• [x] This PR has been categorized with a label (1 of automation, bug, documentation, enhancement, infrastructure, or performance) for the changelog

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