Oh wow I had no idea. I simply bought the template from Themeforest, thinking everything would be in order. Anyway, the font has been changed, well spotted!
If you bought a template from Themeforest, you may have obtained a license for the font. If so, no need to change the font. If not, you'd be doing TF a kindness by letting them know.
It's Google's special brand font so I doubt they license it. However it is served from the same domain as Google Fonts so it's an easy mistake to make.
If you're looking for a replacement font for your tagline on the homepage, Montserrat isn't too different at the heavier weights. Nice to see Laravel Spark in the wild though.