IT-3964: Add workaround for Node20 runners

.github/workflows/main.yaml

@@ -21,6 +21,7 @@ jobs:
     # variables in context environments are setup in github to match branch names
     environment:
       name: ${{ github.ref_name }}
+      ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION: true
 
     steps:
       # use older checkout version due to https://github.com/dawidd6/action-download-artifact/issues/261