Bootstrap v5: Migration docs - breaking change related to media-breakpoint-down() is not included

[petia182]

• Operating system and version (Windows, macOS, Android, iOS) - N/A
• Browser and version (Chrome, Firefox, Safari, Microsoft Edge, Opera, Android Browser) - N/A

I noticed there is a breaking change, related to the media-breakpoint-down() mixin, which is not included in the Migration Documentation

In Bootstrap v4 the media-breakpoint-down() was triggered at the next larger breakpoint, but in Bootstrap v5 this is changed.

Example:
Bootstrap v4 - when using media-breakpoint-down(md) - the breakpoint is equal to @media (max-width: 991.98px) Bootstrap v5 - when using media-breakpoint-down(md) - the breakpoint is equal to @media (max-width: 767.98px)

Codepen Example:
Bootstrap v4 - https://codepen.io/petia182/pen/qBrMBKo
Bootstrap v5 - https://codepen.io/petia182/pen/wvJEvLa

[alpadev]

The information used to be there 🙁 Looks like they got lost in the nether.

• The media-breakpoint-down() uses the breakpoint itself instead of the next breakpoint. Use media-breakpoint-down(lg) instead of media-breakpoint-down(md) to target viewports smaller than the lg breakpoint.
• The media-breakpoint-between() mixin's second parameter also uses the breakpoint itself instead of the next breakpoint. Use media-between(sm, lg) instead of media-breakpoint-between(sm, md) to target viewports between the sm and lg breakpoints.

PR that changed the behaviour: #29148
PR that removed the migration notes: #33834

[petia182]

Thank you!