Bugfix - Fixing release workflow

[crupakheti]

What type of PR is this? (check all applicable)

• [ ] Refactor
• [ ] Feature
• [x] Bug Fix
• [ ] Optimization
• [ ] Documentation Update
• [ ] Dependency Update
• [x] Release

Description

Fixing release workflow to only publish to TestPyPi package repository on non-tag push.

Related Tickets & Documents

• Related Issue #
• Closes #

Linting

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• [x] Yes
• [ ] No, I need help with linting

Testing

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• [x] Yes
• [ ] No, I need help with writing tests

Documentation

Have you updated the README appropriate for this PR?

• [x] Yes
• [ ] No, README does not need any changes for this PR

Changelog

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• [x] Yes
• [ ] No, I need help

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[github-actions[bot]]

Coverage report

This PR does not seem to contain any modification to coverable code.