SBCOSS-399: updated image name to remove prefix

Author: Rakshitha-D

.github/workflows/ghcr-publish.yml

@@ -37,7 +37,7 @@ jobs:
           # Use raw tag name (e.g., release_test_1.0), also force lowercase if needed
           IMAGE_TAG=$(echo "${GITHUB_REF_NAME}" | tr '[:upper:]' '[:lower:]')
 
-          echo "IMAGE_NAME=ghcr.io/${REPO_NAME}" >> $GITHUB_ENV
+          echo "IMAGE_NAME=${REPO_NAME}" >> $GITHUB_ENV
           echo "IMAGE_TAG=${IMAGE_TAG}" >> $GITHUB_ENV
 
       - name: Build Docker image