Revert "test new version of the installer config"

This reverts commit fa425dd.

Author: umbynos

Diff for: .github/workflows/release.yml

@@ -380,7 +380,6 @@ jobs:
         uses: actions/checkout@v3
         with:
           repository: 'bcmi-labs/arduino-create-agent-installer'  # the repo which contains install.xml
-          ref: certs
           token: ${{ secrets.ARDUINO_CREATE_AGENT_CI_PAT }}
 
       - name: Download artifact