Large content padding has invalid value

In `scss/bitstyles/atoms/content/_settings.scss`, the value of the large padding is given as `l1`:

```scss
'l': var(design-token.get('content', 'padding', 'l1')),
```

But this value doesn’t exist — the correct value is just `l`

```scss
'l': var(design-token.get('content', 'padding', 'l')),
```