manifest: correct the registry path in the pin

I had rewritten co-op/member-portal to code/member-portal while bumping the tag. The repository path in a live pin is the registry location the image is stored and fetched from; changing it points Cloudron at a repo that does not hold this app. Only the tag should move.

CloudronManifest.json

@@ -31,5 +31,5 @@
   "manifestVersion": 2,
   "website": "https://inference.coop",
   "contactEmail": "info@inference.coop",
-  "dockerImage": "registry.inference.coop/code/member-portal:20261101-e1ec25f"
+  "dockerImage": "registry.inference.coop/co-op/member-portal:20261101-e1ec25f"
 }