Improve codestyle

Author: Ornella33

server/app/interfaces/discovery.py

@@ -98,7 +98,8 @@ def __init__(self, persistent_store: DiscoveryStore, base_path: str = "/api/v3.1
                         Submount(
                             "/lookup/shells",
                             [
-                                Rule("/", methods=["GET"], endpoint=self.get_all_aas_ids_by_asset_link), # this route is deprecated 
+                                # This route is deprecated
+                                Rule("/", methods=["GET"], endpoint=self.get_all_aas_ids_by_asset_link),
                                 Rule(
                                     "/<base64url:aas_id>",
                                     methods=["GET"],