registry: update versions from tags (#286)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: GaspardKirira

index/cnerium.runtime.json

@@ -71,6 +71,10 @@
     "0.3.0": {
       "tag": "v0.3.0",
       "commit": "92d7c256c8225ea0a015b3ae61f133b605efd518"
+    },
+    "0.4.0": {
+      "tag": "v0.4.0",
+      "commit": "3350c76fef94edb919d79fa3d05af5da85c7a24d"
     }
   }
 }