Use Bash parameter expansion to convert image_name to lowercase

Author: ga-lep

.github/workflows/docker-publish.yml

@@ -6,7 +6,6 @@ on:
 
 env:
   REGISTRY: ghcr.io
-  IMAGE_NAME: ${{ toLower(github.repository) }}
 
 jobs:
   build-and-push:
@@ -18,6 +17,10 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+      
+      - name: downcase IMAGE_NAME
+        run: |
+          echo "IMAGE_NAME=${GITHUB_REPOSITORY@L}" >> "${GITHUB_ENV}"
 
       - name: Extract version from pyproject.toml
         id: version
@@ -51,4 +54,4 @@ jobs:
             org.opencontainers.image.version=${{ steps.version.outputs.version }}
             org.opencontainers.image.source=${{ github.repositoryUrl }}
             org.opencontainers.image.revision=${{ github.sha }}
-            org.opencontainers.image.licenses=GNU Lesser General Public License v3.0
+            org.opencontainers.image.licenses=LGPL-3.0-or-later