[build] use new auto build ghcr.io docker images

Author: the-hampel

.github/workflows/build.yml

@@ -23,7 +23,10 @@ jobs:
 
     runs-on: ubuntu-latest
     container: 
-      image: materialstheory/solid_dmft_ci
+      image: ghcr.io/triqs/solid_dmft_github_ci:unstable
+      credentials:
+        username: ${{ github.actor }}
+        password: ${{ secrets.github_token }}
 
     steps:
       - uses: actions/checkout@v4