Update GitHub actions workflow branch reference

The branch reference in the packages.yml workflow file has been updated. We are no longer verifying commits against origin/v3.1.0, and instead verifying them against origin/main. This change aligns with the latest naming convention

.github/workflows/packages.yml

@@ -18,10 +18,10 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
-      - name: Verify commit exists in origin/v3.1.0
+      - name: Verify commit exists in origin/main
         run: |
           git fetch --no-tags --prune --depth=1 origin +refs/heads/*:refs/remotes/origin/*
-          git branch --remote --contains | grep origin/v3.1.0
+          git branch --remote --contains | grep origin/main
       - name: Set VERSION variable
         run: |
           if [[ "${{ github.ref }}" == refs/tags/* && "${{ github.event_name }}" == "release" && "${{ github.event.action }}" == "published" ]]; then