@julien-deramond is this correct or all of the deprecation warnings on bootstrap main branch are coming for there?

If we have warnings coming from rfs, we should fix them here and update the included version in Bootstrap.

Bootstrap main branch is fixed via twbs/bootstrap#40623 (and will be available with v5.3.4).
I don't know well this repository, maybe there are also specific fixes to do here.
When do we see these deprecation warnings in this repository? Running which commands?

In theory updating sass in this repo to the latest version and running all tests should reveal any warnings.

For example I see this here https://github.com/twbs/examples/actions/runs/10684628167/job/29615519708?pr=496

    ┌──> node_modules/bootstrap/scss/_type.scss
38  │       font-family: $display-font-family;
    │       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ declaration
    ╵
    ┌──> node_modules/bootstrap/scss/vendor/_rfs.scss
136 │ ┌     @media (#{$rfs-mq-property-width}: #{$rfs-mq-value}) {
137 │ │       @content;
138 │ │     }
    │ └─── nested rule
    ╵
    node_modules/bootstrap/scss/_type.scss 38:5  @import

which points to rfs