Fix push on release reference name (pytorch#2492)

Summary:
Fix push on release reference name
We want to compare it against refs/heads/release rather then release
Tests: atalman/vision@af17cd9
Sets correctly release chanell (wheels): https://github.com/atalman/vision/runs/6901327010?check_suite_focus=true

Pull Request resolved: pytorch#2492

Reviewed By: hwangjeff

Differential Revision: D37174090

Pulled By: atalman

fbshipit-source-id: e114972935572a701eb7daff429a0df0ed5a75e4

Author: atalman

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

@@ -32,7 +32,7 @@ jobs:
             echo "CHANNEL=test" >> "$GITHUB_ENV"
           fi
       - name: Set Release CHANNEL (for release)
-        if: ${{ (github.event_name == 'pull_request' && startsWith(github.base_ref, 'release')) || startsWith(github.ref, 'release') }}
+        if: ${{ (github.event_name == 'pull_request' && startsWith(github.base_ref, 'release')) || startsWith(github.ref, 'refs/heads/release') }}
         run: |
           echo "CHANNEL=test" >> "$GITHUB_ENV"
       - name: Build TorchAudio M1 wheel
@@ -114,7 +114,7 @@ jobs:
             echo "CHANNEL=test" >> "$GITHUB_ENV"
           fi
       - name: Set Release CHANNEL (for release)
-        if: ${{ (github.event_name == 'pull_request' && startsWith(github.base_ref, 'release')) || startsWith(github.ref, 'release') }}
+        if: ${{ (github.event_name == 'pull_request' && startsWith(github.base_ref, 'release')) || startsWith(github.ref, 'refs/heads/release') }}
         run: |
           echo "CHANNEL=test" >> "$GITHUB_ENV"
       - name: Install conda-build and purge previous artifacts