Fix viable strict updating job

[metascroy]

Default uses master as main branch, but ET uses main

[pytorch-bot]

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• Unrelated MacOS MPS test jobs time out (30 min) due to stale cpp_extension lock file poisoning self-hosted runners

⏳ No Failures, 4 Pending

As of commit 11fcbd9 with merge base 666ba0b ():
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