Don't persist credentials from git checkout

[t1m0thyj]

What It Does

How to Test

Review Checklist
I certify that I have:

• tested my changes
• added/updated automated tests
• updated the changelog
• followed the contribution guidelines

Additional Comments

[github-actions]

Release failed for the main branch. 😢

Error: Protected branch main does not allow major version changes
    at Object.<anonymous> (/home/runner/work/_actions/zowe-actions/octorelease/v1/dist/core.js:22388:13)
    at Generator.next (<anonymous>)
    at /home/runner/work/_actions/zowe-actions/octorelease/v1/dist/core.js:69:61
    at new Promise (<anonymous>)
    at __async (/home/runner/work/_actions/zowe-actions/octorelease/v1/dist/core.js:53:10)
    at Object.verifyConditions (/home/runner/work/_actions/zowe-actions/octorelease/v1/dist/core.js:22375:10)
    at /home/runner/work/_actions/zowe-actions/octorelease/v1/dist/index.js:2245:30
    at Generator.next (<anonymous>)
    at fulfilled (/home/runner/work/_actions/zowe-actions/octorelease/v1/dist/index.js:40:24)

Check the workflow run for more error details.

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