fix workflow part III

Author: HenriWahl

.github/workflows/build-release-latest.yml

@@ -13,8 +13,8 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       # build container image for package creation
-      - run: docker pull ${{ cr_image }}:${{ github.job }} || docker build -t ${{ cr_image }}:${{ github.job }} -f dockerfiles/checkmk/Dockerfile .
-      - run: docker push ${{ cr_image }}:${{ github.job }}
+      - run: docker pull ${{ env.cr_image }}:${{ github.job }} || docker build -t ${{ env.cr_image }}:${{ github.job }} -f dockerfiles/checkmk/Dockerfile .
+      - run: docker push ${{ env.cr_image }}:${{ github.job }}
 
 #  build-package:
 #    runs-on: ubuntu-latest