chore: fix gh action and remove ssh

Author: dtbuchholz

.github/workflows/upgrade-safe.yaml

@@ -15,12 +15,6 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{ !github.event.pull_request.draft }}
     steps:
-      - uses: webfactory/[email protected]
-        with:
-          ssh-private-key: |
-            ${{ secrets.BUILTIN_ACTORS_DEPLOY_KEY }}
-            ${{ secrets.CONTRACTS_DEPLOY_KEY }}
-
       - uses: actions/checkout@v3
         with:
           submodules: recursive