chore: pre-apply PR #1424 — lowercase GHCR registry, deployment environment

Author: sbryngelson

.github/workflows/docker.yml

@@ -155,15 +155,15 @@ jobs:
             org.opencontainers.image.source=https://github.com/${{ github.repository }}
           tags: |
             ${{ secrets.DOCKERHUB_USERNAME }}/mfc:${{ env.TAG }}-amd-ubuntu-22.04
-            ghcr.io/${{ github.repository_owner }}/mfc:${{ env.TAG }}-amd-ubuntu-22.04
+            ${{ env.GH_REGISTRY }}:${{ env.TAG }}-amd-ubuntu-22.04
           push: true
 
   manifests:
     runs-on: ubuntu-latest
     needs: Container
     environment:
       name: containers
-      url: https://hub.docker.com/r/${{ secrets.DOCKERHUB_USERNAME }}/mfc
+      url: https://hub.docker.com/r/mflowcode/mfc
     steps:
       - name: Login to Docker Hub
         uses: docker/login-action@v3