Update GitHub workflow for better branch handling

This update modifies the GitHub workflow in packages.yml for improved branch name extraction and more accurate commit verification. It provides more feedback by outputting the extracted branch name, and checks for commits in the specific branch rather than in 'origin/dispatch-channels'.

.github/workflows/packages.yml

@@ -20,10 +20,12 @@ jobs:
     timeout-minutes: 30
     steps:
       - name: Extract branch name
-        run: echo "BRANCH_NAME=$(echo ${GITHUB_REF#refs/heads/} | rev | cut -d/ -f1 | rev)" >> $GITHUB_ENV
+        run: |
+          echo "BRANCH_NAME=$(echo ${GITHUB_REF#refs/heads/} | rev | cut -d/ -f1 | rev)" >> $GITHUB_ENV
+          echo "Branch name: $BRANCH_NAME"
       - name: Checkout
         uses: actions/checkout@v3
-      - name: Verify commit exists in origin/dispatch-channels
+      - name: Verify commit exists in branch
         run: |
           git fetch --no-tags --prune --depth=1 origin +refs/heads/*:refs/remotes/origin/*
           git branch --remote --contains | grep origin/${BRANCH_NAME}