Mushroom theme changes

[jhemak]

Following recent updates to the Mushroom cards, the font weight of timer bar card in Mushroom mode no longer matches. The Name and time remaining both appear more bold than the primary and secondary text on all other mushroom cards.

I was able to use card_mod as a workaround until you are able to update the source code (wish I knew how to do that to help you out!)

card_mod:
    style: |
      ha-card {
        --card-primary-font-weight: var(--mush-card-primary-font-weight, 500);
        --card-secondary-font-weight: var(--mush-card-secondary-font-weight, 400);
        --secondary-text-color: var(--mush-card-secondary-color, var(--primary-text-color));
      }