Update the upload job

[pytorchbot]

The current regex doesn't match as needed, but the corrected one does. Also exporting the GITHUB_REF variable just in case.

[pytorch-bot[bot]]

:link: Helpful Links

:test_tube: See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/3387

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As of commit 4aec0a348a243559bd74636bffc0292859b1a063 with merge base d3326a2073dee7baf78044fb3afd0772edbc616a (): :green_heart: Looks good so far! There are no failures yet. :green_heart:

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