Complete xxl → 2xl breakpoint rename across documentation and data files

Co-authored-by: mdo <98681+mdo@users.noreply.github.com>

Author: Copilot

dist/css/bootstrap-grid.css

@@ -28,8 +28,8 @@
   min-width: 1200px
   container: 1140px
 
-- breakpoint: xxl
-  abbr: -xxl
-  name: XX-Large
-  min-width: 1400px
-  container: 1320px
+- breakpoint: 2xl
+  abbr: -2xl
+  name: 2X-Large
+  min-width: 1600px
+  container: 1440px

dist/css/bootstrap-grid.css.map

@@ -645,7 +645,7 @@ Add `.dropdown-menu-end` to a `.dropdown-menu` to right align the dropdown menu.
 
 If you want to use responsive alignment, disable dynamic positioning by adding the `data-bs-display="static"` attribute and use the responsive variation classes.
 
-To align **right** the dropdown menu with the given breakpoint or larger, add `.dropdown-menu{-sm|-md|-lg|-xl|-xxl}-end`.
+To align **right** the dropdown menu with the given breakpoint or larger, add `.dropdown-menu{-sm|-md|-lg|-xl|-2xl}-end`.
 
 <Example code={`<div class="btn-group">
     <button type="button" class="btn btn-secondary dropdown-toggle" data-bs-toggle="dropdown" data-bs-display="static" aria-expanded="false">
@@ -658,7 +658,7 @@ To align **right** the dropdown menu with the given breakpoint or larger, add `.
     </ul>
   </div>`} />
 
-To align **left** the dropdown menu with the given breakpoint or larger, add `.dropdown-menu-end` and `.dropdown-menu{-sm|-md|-lg|-xl|-xxl}-start`.
+To align **left** the dropdown menu with the given breakpoint or larger, add `.dropdown-menu-end` and `.dropdown-menu{-sm|-md|-lg|-xl|-2xl}-start`.
 
 <Example code={`<div class="btn-group">
     <button type="button" class="btn btn-secondary dropdown-toggle" data-bs-toggle="dropdown" data-bs-display="static" aria-expanded="false">