White-labeling guide: custom-dashboard-2.png still shows the removed left-drawer widget picker

## Summary

The Layer5 Cloud white-labeling guide illustrates dashboard customization with `custom-dashboard-2.png`, which shows the widget picker docked as a **left-hand drawer**. That drawer no longer exists.

## What changed

layer5io/meshery-cloud#5992 migrates the Cloud dashboard off its bespoke MUI `Drawer` onto Sistent's `DashboardLayout` + `WidgetPicker`. The picker is now:

- a **right-hand sticky panel** on desktop (above the `md` breakpoint), pinned under the navbar; and
- a **bottom sheet** on narrow viewports, opened from a floating action button - not a drawer at all.

The screenshot therefore shows a control in a position a reader will not find, which is worse than no screenshot: it reads as a navigation instruction.

## What needs doing

Re-capture `custom-dashboard-2.png` (and any sibling shot in the same walkthrough that frames the picker) against the dashboard after #5992 lands, and check the surrounding prose for any left/drawer wording that the image was carrying.

Filed rather than fixed in place: #5992 is a community contributor's PR in another repository, and the remedy here is an image plus copy in this one.

Start by checking layer5io/meshery-cloud#5992 and the walkthrough containing custom-dashboard-2.png. Re-capture the image after the dashboard change lands, review any sibling shot and surrounding prose for left-hand drawer wording, and finish when the screenshots and copy match the right-side panel or mobile bottom-sheet behavior.

Written by the indexing model from the issue text.