bx-lg class does not work in 2.0.3
In the minified version at https://cdn.jsdelivr.net/npm/boxicons@2.0.3/css/boxicons.min.css the  "rem" unit in .bx.lg is missing.
It should be `.bx-lg {font-size:3.0rem!important}` to work. The unminified version it's ok though.

At first it is not evident because in https://boxicons.com/usage/#sizing you are using a non-exitent icon "smiley-happy" bringing an empty frame in the demostration.
If you use i.e. "smile" you'll see the effect clearly:
```
<div class="sc-1uawk0q-0 iHBVeo">
<i class="bx bxs-smile bx-xs "></i>
<i class="bx bxs-smile bx-sm"></i>
<i class="bx bxs-smile bx-lg"></i>
<i class="bx bxs-smile bx-md"></i>
</div>
```
BTW thank you for your great work!