Document the change to breakpoint mixins (twbs#34251)

* Document the change to breakpoint mixins

* Update migration.md

Co-authored-by: XhmikosR <xhmikosr@gmail.com>

site/content/docs/5.0/migration.md

@@ -45,6 +45,10 @@ toc: true
   - `$yiq-contrasted-threshold` is renamed to `$min-contrast-ratio`.
   - `$yiq-text-dark` and `$yiq-text-light` are respectively renamed to `$color-contrast-dark` and `$color-contrast-light`.
 
+- <span class="badge bg-danger">Breaking</span> Media query mixins parameters have changed for a more logical approach.
+  - `media-breakpoint-down()` uses the breakpoint itself instead of the next breakpoint (e.g., `media-breakpoint-down(lg)` instead of `media-breakpoint-down(md)` targets viewports smaller than `lg`).
+  - Similarly, the second parameter in `media-breakpoint-between()` also uses the breakpoint itself instead of the next breakpoint (e.g., `media-between(sm, lg)` instead of `media-breakpoint-between(sm, md)` targets viewports between `sm` and `lg`).
+
 - <span class="badge bg-danger">Breaking</span> Removed print styles and `$enable-print-styles` variable. Print display classes are still around. [See #28339](https://github.com/twbs/bootstrap/pull/28339).
 
 - <span class="badge bg-danger">Breaking</span> Dropped `color()`, `theme-color()`, and `gray()` functions in favor of variables. [See #29083](https://github.com/twbs/bootstrap/pull/29083).