GitLab

Summary:
Follow-up of https://github.com/pytorch/audio/issues/3292

Doc deployment is gated by branch_name == nightly, but nightly branch fires push and PR events and there will be two deployment jobs.

This commit specify push event.

Pull Request resolved: https://github.com/pytorch/audio/pull/3294

Reviewed By: hwangjeff

Differential Revision: D45501983

Pulled By: mthrok

fbshipit-source-id: 8eb66b463800f6a30affafb27f5f2448a561cfe1