fix operator version in release flow

[AlexFenlon]

Proposed changes

fix operator version in release flow

Checklist

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• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

[Copilot]

Pull Request Overview

This PR fixes an issue in the release workflow where the operator version was being double-prefixed with 'v'. The change removes the hardcoded 'v' prefix since the input version already includes it.

• Corrected version string format in the preflight container check command

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