ci: Fix nightly docker image in forks (#2438)

.github/workflows/build_clio_docker_image.yml

@@ -83,6 +83,11 @@ jobs:
         shell: bash
         run: strip ./docker/clio/clio_server
 
+      - name: Set GHCR_REPO
+        id: set-ghcr-repo
+        run: |
+          echo "GHCR_REPO=$(echo ghcr.io/${{ github.repository_owner }} | tr '[:upper:]' '[:lower:]')" >> ${GITHUB_OUTPUT}
+
       - name: Build Docker image
         uses: ./.github/actions/build_docker_image
         env:
@@ -91,8 +96,8 @@ jobs:
           DOCKERHUB_PW: ${{ secrets.DOCKERHUB_PW }}
         with:
           images: |
-            ghcr.io/xrplf/clio
-            rippleci/clio
+            ghcr.io/${{ steps.set-ghcr-repo.outputs.GHCR_REPO }}/clio
+            ${{ github.repository_owner == 'XRPLF' && 'rippleci/clio' || '' }}
           push_image: ${{ inputs.publish_image }}
           directory: docker/clio
           tags: ${{ inputs.tags }}