Bump lightningcss from 1.30.2 to 1.32.0

[julien-deramond]

This PR bumps lightningcss from 1.30.2 to 1.32.0. The versions are minor but they include some issues and bug fixes (see Releases).

So I compared the dist/css/bootstrap.min.css files built from v6-dev and this branch: lightnincss.txt.

This diff file (that I can't copy here because it's too long for GitHub) shows this kind of modifications in the entire minified file where some missing whitespaces have been added back:

2,7c2,7
>   --bs-blue-025: color-mix(in lab, var(--bs-white) 94%, oklch(60% .24 240));
>   --bs-blue-050: color-mix(in lab, var(--bs-white) 90%, oklch(60% .24 240));
>   --bs-blue-100: color-mix(in lab, var(--bs-white) 80%, oklch(60% .24 240));
>   --bs-blue-200: color-mix(in lab, var(--bs-white) 60%, oklch(60% .24 240));
>   --bs-blue-300: color-mix(in lab, var(--bs-white) 40%, oklch(60% .24 240));
>   --bs-blue-400: color-mix(in lab, var(--bs-white) 20%, oklch(60% .24 240));
---
<   --bs-blue-025: color-mix(in lab, var(--bs-white)94%, oklch(60% .24 240));
<   --bs-blue-050: color-mix(in lab, var(--bs-white)90%, oklch(60% .24 240));
<   --bs-blue-100: color-mix(in lab, var(--bs-white)80%, oklch(60% .24 240));
<   --bs-blue-200: color-mix(in lab, var(--bs-white)60%, oklch(60% .24 240));
<   --bs-blue-300: color-mix(in lab, var(--bs-white)40%, oklch(60% .24 240));
<   --bs-blue-400: color-mix(in lab, var(--bs-white)20%, oklch(60% .24 240));

>     margin: var(--bs-hr-margin-y, var(--bs-spacer)) 0;
---
<     margin: var(--bs-hr-margin-y, var(--bs-spacer))0;

753,754c753,754
>    margin-inline: calc(-.5 * var(--bs-gutter-x));
>     margin-top: calc(-1 * var(--bs-gutter-y));
---
<     margin-inline: calc(-.5*var(--bs-gutter-x));
<     margin-top: calc(-1*var(--bs-gutter-y));

I don't know if it was really an issue before, but it should be better now.

The diff is 1700 lines-long. Hopefully I'm not mistaken, but I have only seen 1-for-1 changes related to these missing whitespaces.