docs(tabs): remove duplicated shortcut (#11541)

Author: PowerKiKi

src/lib/tabs/tabs.md

@@ -121,5 +121,4 @@ Tabs without text or labels should be given a meaningful label via `aria-label`
 | `RIGHT_ARROW`        | Move focus to next tab     |
 | `HOME`               | Move focus to first tab    |
 | `END`                | Move focus to last tab     |
-| `RIGHT_ARROW`        | Move focus to next tab     |
 | `SPACE` or `ENTER`   | Switch to focused tab      |