It is very important to know that just because something is safe for human consumption does NOT (I repeat NOT) make it safe for rabbits! The same is true for all our pets (chocolate and raisins being exxcellent examples of human safe food that can poison dogs and cats) but rabbits are very different.
Sorry I haven’t had time to look at the site posted but my own suggestion is to visit rabbit.org, the House Rabbit Society’s website, there is a comprehensive list of rabbit safe food on it (that includes herbs) and I’d choose from that.
Considering how different the rabbit digestive system is from humans (and dogs and cats) I’m not too sure how beneficial they might be medicinally, or in what form such benefits might be more bio available. (For example an infusion (large quantity of herbs steeped for a Long period of time in boiled water) will draw more mineral and vitamins from dry plant matter then they will from fresh.) However, the first priority is to insure that only herbs that are safe are fed to the rabbits.
Apparently most love mint and all forms of mint are safe (and for humans it is an excellent digestive) mine hate it but it is popular with most. Mine adore basil, lemon balm, lemon verbena, dandelions (also very healthy), chamomile, thyme, sage and rosemary. They don’t mind lavender and pansies (not a herb but I thought of it) either. Rose leaves and petals are also safe and very healthy, although mine haven’t taken to them. (But note the mint already mentioned, don’t go by what mine like!) And of course to state the obvious, it is important that any herbs and flowers they receive have not been dosed with chemicals.
Best of luck selecting herbs!