Explicitly check value of deploy vars in GHA to ensure correct logic

[CAM-Gerlach]

Pull Request

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• [x] Read and followed this repo's Contributing Guidelines
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Description of Changes

The final production deploy of #367 failed because the deploy logic was off; these checks of the GHA env vars need to explicitly check for '1' and not just truthy as '0' is also truthy. This should fix it. Also, see if the yet another brabd new linkcheck error re-occurs.

[CAM-Gerlach]

Going ahead and merging since this fixes an urgent deploy issue and can only be fully tested directly on master.