fix(attest): get the correct image name from package.json

Author: Th3S4mur41

.github/workflows/semantic-release.yml

@@ -71,11 +71,13 @@ jobs:
         run: |
           npm run release
           echo "version=$(npm run env | grep npm_package_version | cut -d '=' -f 2)" >> $GITHUB_OUTPUT
+          echo "package_name=$(npm run env | grep npm_package_name | cut -d '=' -f 2)" >> $GITHUB_OUTPUT
 
       - name: '✍️ Attest'
         uses: actions/attest-build-provenance@v2
         id: attest
         with:
-          subject-name: ghcr.io/${{ github.repository }}
+          subject-name: ghcr.io/${{ github.repository_owner }}/${{ steps.npm-release.outputs.package_name }} # TODO: replace with line below
+          # subject-name: ghcr.io/${{ github.repository }}
           subject-digest: sha256:${{ steps.npm-release.outputs.docker_image_sha_long }}
           push-to-registry: true