Updating logic for Image tag prefix

Signed-off-by: Anushka <anush159@in.ibm.com>

Author: anushka159-a

.github/workflows/docker-release.yml

@@ -58,10 +58,10 @@ jobs:
 
       - name: Set image prefix
         run: |
-          if [ "${{ github.repository_owner }}" = "hyperledger" ]; then
-            echo "IMAGE_PREFIX=hyperledger" >> $GITHUB_ENV
-           else
-            echo "IMAGE_PREFIX=${{ secrets.DOCKERHUB_USERNAME }}" >> $GITHUB_ENV
+          if [ "$GITHUB_REPOSITORY_OWNER" == "hyperledger" ]; then
+           echo "IMAGE_PREFIX=hyperledger" >> $GITHUB_ENV
+          else
+           echo "IMAGE_PREFIX=${{ secrets.DOCKERHUB_USERNAME }}" >> $GITHUB_ENV
           fi
 
       - name: Build and Push Multi-Platform Docker Image for Committer