clean up create image tag

.github/workflows/container-build.yml

@@ -23,7 +23,14 @@ jobs:
       - name: Create Image Tags
         id: image-tag
         run: |
-          python -c "print('tags=', ', '.join([f'ghcr.io/fkie-cad/logprep:py${{ matrix.python-version }}-{tag.strip()}' for tag in '${{ inputs.tags }}'.split(',')]), sep='')"  >> $GITHUB_OUTPUT
+          python - <<EOF
+          import os
+          image = "ghcr.io/fkie-cad/logprep"
+          version = "${{ matrix.python-version }}"
+          tags = "${{ input.tags }}".split(",")
+          full_image = [f"{image}:py{version}-{tag.strip()}" for tag in tags]
+          os.environ["GITHUB_OUTPUT"] = f"tags={','.join(full_image)}"
+          EOF
 
       - name: Debug Image Tag
         run: |
@@ -40,8 +47,6 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-
-
       - name: Build image and export to Docker
         uses: docker/build-push-action@v6
         id: build-and-push