Update build.yml

Author: osalpekar

.github/workflows/build.yml

@@ -14,7 +14,7 @@ jobs:
       runner: linux.12xlarge
       repository: pytorch/pytorch.github.io
       docker-image: cimg/ruby:2.7-node
-      secrets-env: GITHUB_TOKEN
+      secrets-env: PYTORCHBOT_TOKEN
       script: |
         git config --global --add safe.directory /__w/pytorch.github.io/pytorch.github.io
         set -euxo pipefail