[Release only] Use release/2.3 instead of main for test-infra-ref

[atalman]

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[pytorch-bot]

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✅ You can merge normally! (2 Unrelated Failures)

As of commit 4d0ea39 with merge base 9cb639a ():

FLAKY - The following job failed but was likely due to flakiness present on trunk:

• Tests / unittests-linux (3.9, linux.12xlarge, cpu) / linux-job (gh)
  The process '/usr/bin/git' failed with exit code 128

BROKEN TRUNK - The following job failed but was present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• Update viable/strict / do_update_viablestrict / do_update_viablestrict (gh)
  Process completed with exit code 1.

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