Fix error handling unsupported (#1994)

* Try to catch unhealthy

* revert

supervisor/core.py

@@ -149,7 +149,7 @@ class Core(CoreSysAttributes):
         # Check if image names from denylist exist
         try:
             if await self.sys_run_in_executor(self.sys_docker.check_denylist_images):
-                self.coresys.supported = False
+                self.supported = False
                 self.healthy = False
         except DockerAPIError:
             self.healthy = False