build(#131): use app token to authenticate workflow

[andybeet]

Your commits explain the who, what, where and when of these changes. Your code shows the how. You do not need to reiterate this. This PR should complete the picture by explaining why these changes are necessary.
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Justification

With the creation of repository rulesets protecting from directly committing to main or dev. The getFred workflow can not pull and commit to main on its regular cycle. A GitHub App called auto-commit-to-main has been created in the NOAA-EDAB org. And secrets added to this repo to be used in the yml.

Fixes #131

Types of changes

What types of changes does this pull request introduce? Put an x in the boxes that apply.
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• Fix (non-breaking change which fixes a bug)
• Feature (non-breaking change which adds or changes functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Other change (if none of the other choices apply)

Reviewer instructions

Not sure how this can be tested prior to merging into main.
It works on a forked version of this repo.

Formatting

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Code submitted in this pull request will be automatically checked for correct formatting.

[BBeltz1]

the code looks good to me. if this worked on the fork, i think its safe to approve. we can tweak after deployment if needed