Fix typo in release build step (#2495)

Summary:
Fix typo in release build step

Pull Request resolved: https://github.com/pytorch/audio/pull/2495

Reviewed By: hwangjeff

Differential Revision: D37176695

Pulled By: atalman

fbshipit-source-id: 37b4e30c1084e506f3a45cf7427784c955868909

.github/workflows/build-m1-binaries.yml

@@ -142,7 +142,7 @@ jobs:
             setup_cuda
             setup_base_build_version
             export CONDA_CHANNEL_FLAGS="pytorch-test"
-            etup_macos
+            setup_macos
           else
             setup_cuda
             setup_build_version