fix arion

nixos/arion-riverside/arion-compose.nix

@@ -8,6 +8,7 @@
     app = {
       service = {
         image = "forge.quinefoundation.com/ironmagma/riverside@sha256:303ac1b79b675230e917c1f3c35f2e1cd81527374af35a7a8419b9b22b65ca6e";
+        pull_policy = "always";
         container_name = "riverside";
         restart = "unless-stopped";
         networks = [ "riverside" ];