Update branch verification in GitHub workflow

The GitHub workflow configuration has been updated to verify that the commit exists in the branch 'origin/3.0.1' instead of 'origin/main'. This is done during the automated package generation process.

.github/workflows/packages.yml

@@ -20,10 +20,10 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
-      - name: Verify commit exists in origin/main
+      - name: Verify commit exists in origin/3.0.1
         run: |
           git fetch --no-tags --prune --depth=1 origin +refs/heads/*:refs/remotes/origin/*
-          git branch --remote --contains | grep origin/main
+          git branch --remote --contains | grep origin/3.0.1
       - name: Set VERSION variable
         run: |
           if [[ "${{ github.ref }}" == refs/tags/* && "${{ github.event_name }}" == "release" && "${{ github.event.action }}" == "published" ]]; then