fix: update GitHub Actions to skip Docker builds for forked repositories

Author: gounthar

.github/workflows/github-docker-registry-push.yml

@@ -121,14 +121,6 @@ jobs:
           echo "BRANCH=$BRANCH_NAME" >> $GITHUB_ENV
         id: extract_branch
 
-      - name: Extract branch name and set BRANCH environment variable
-        # This step extracts the branch name and sets the BRANCH environment variable
-        shell: bash
-        run: |
-          BRANCH_NAME=$(echo ${GITHUB_REF#refs/heads/} | sed -e 's#/#-#g')
-          if [[ "$BRANCH_NAME" == "main" ]]; then BRANCH_NAME=""; fi
-          echo "BRANCH=$BRANCH_NAME" >> $GITHUB_ENV
-
       - name: Set repository name to lowercase
         # This step sets the repository name to lowercase
         run: echo "REPO_NAME=$(echo ${{ github.repository }} | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV