fix(CI): do not run canary release script if PR belongs to fork

.github/workflows/canary.yml

@@ -9,6 +9,7 @@ jobs:
   publish-canary:
     name: Publish Canary
     runs-on: ubuntu-latest
+    if: github.event.pull_request.head.repo.full_name == github.repository
     steps:
       - name: Checkout Master
         uses: actions/checkout@v2