Use explicit ghcr.io registry

Author: Wirone

.github/workflows/release.yml

@@ -5,9 +5,6 @@ on:
     types:
       - published
 
-env:
-  REGISTRY: ghcr.io
-
 jobs:
   release-phar:
     runs-on: ${{ matrix.operating-system }}
@@ -77,7 +74,7 @@ jobs:
       - name: Log in to the Container registry
         uses: docker/login-action@v3
         with:
-          registry: ${{ env.REGISTRY }}
+          registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
@@ -87,7 +84,7 @@ jobs:
         with:
           flavor: |
             latest=true
-          images: ${{ env.REGISTRY }}/${{ github.repository }}
+          images: ghcr.io/${{ github.repository }}
           tags: |
             type=semver,pattern={{version}}
             type=semver,pattern={{major}}.{{minor}}