fix: image name and description variable interpolation (#62)

Author: joshua-stone

.github/workflows/build.yml

@@ -136,10 +136,10 @@ jobs:
         id: meta
         with:
           images: |
-            $IMAGE_NAME
+            ${{ env.IMAGE_NAME }}
           labels: |
-            org.opencontainers.image.title=$IMAGE_NAME
-            org.opencontainers.image.description=ublue-os $IMAGE_NAME with Nvidia drivers added
+            org.opencontainers.image.title=${{ env.IMAGE_NAME }}
+            org.opencontainers.image.description=ublue-os ${{ matrix.image_name }} with Nvidia drivers added
             io.artifacthub.package.readme-url=https://raw.githubusercontent.com/${{ github.repository }}/main/README.md
             io.artifacthub.package.logo-url=https://avatars.githubusercontent.com/u/1728152?s=200&v=4
       # Build image using Buildah action