Peppermint tea while breastfeeding

Kris🐶🐶👶🏼
I just disclvered yesterday that i love peppermint tea. I never had it befor. I also discovered today, after i bought some peppermint teabags, that its herbal and i shouldnt drink it while breastfeeding. Would one cup a week  hurt my supply? Im not a huge hot beverage drinker but i got excited that i found something i like 😫