fix: update-workflow

Author: BasudevBharatBhushan

.github/workflows/prepare-release-pr.yml

@@ -16,7 +16,6 @@ jobs:
         uses: actions/checkout@v3
         with:
           fetch-depth: 0
-          # This is crucial - explicitly tell it to get all branches
           ref: master
 
       - name: Set Git Identity
@@ -28,12 +27,11 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          # Ensure we have the latest from both branches
-          git fetch origin master:master
-          git fetch origin main:main
+          # We're already on master, just need to fetch main
+          git fetch origin main:refs/remotes/origin/main
 
           # Check if there are differences between main and master
-          DIFF_COUNT=$(git rev-list --count main..master)
+          DIFF_COUNT=$(git rev-list --count origin/main..HEAD)
 
           if [ "$DIFF_COUNT" -gt 0 ]; then
             echo "Differences found between main and master. Creating PR..."