Card component update() raises TypeError instead of warning when not implemented

Summary

Calling .update() on a card component that does not implement it raises TypeError instead of emitting the intended warning.

UserComponent.update builds its warning message with % formatting, but the string has no placeholder:

# metaflow/plugins/cards/card_modules/components.py
def update(self, *args, **kwargs):
    cls_name = self.__class__.__name__
    msg = (
        "MetaflowCardComponent doesn't have an `update` method implemented "
        "and is not compatible with realtime updates."
    ) % cls_name
    _warning_with_component(self, msg)

cls_name is computed and then never interpolated, so % raises before _warning_with_component is reached.

Reproduction

from metaflow.plugins.cards.card_modules.components import UserComponent

class MyComponent(UserComponent):
    def render(self):
        return "x"

MyComponent().update("new value")

Actual:

TypeError: not all arguments converted during string formatting

Expected: the documented warning, naming the component class. This is the documented realtime API (current.card["mycardid"].components["comp123"].update() in component_serializer.py), so a user whose custom component lacks update gets a TypeError from inside Metaflow rather than the "not compatible with realtime updates" message.

A component that does implement update, such as Markdown, is unaffected.

Environment

Reproduced on master (8b500da), Python 3.11.