Default branch renames (#1102)

Summary: Pull Request resolved: https://github.com/facebook/yoga/pull/1102

Test Plan: _eyes

Reviewed By: timur-valiev

Differential Revision: D30302214

Pulled By: passy

fbshipit-source-id: 5b232136c20553883e148d10c99f9e73b8f36757

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
         run: yarn build
         working-directory: website
       - name: Deploy
-        if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
+        if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
         uses: peaceiris/actions-gh-pages@v3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}