Update ci.yml

Author: ghobona

.github/workflows/ci.yml

@@ -5,7 +5,7 @@ on: [push, pull_request]
 jobs:
   build:
     runs-on: ubuntu-latest
-    container: metanorma/mn:latest
+    container: metanorma/metanorma:latest
     steps:
       - name: Checkout repo
         uses: actions/checkout@v3