added/corrected, rotate keybindings
added/corrected, rotate keybindings

In the "Windows manipulation commands (start with ~w~):" section:
Added the `SPC w r` keybinding:
| ~SPC w r~              | rotate windows forward                                                      |

In the `SPC w R` keybinding description, replaced "clockwise" with "backward".
| ~SPC w R~              | rotate windows backward                                                     |

In the "Window manipulation transient state" section:
Added the`r` keybinding.
| ~r~           | rotate windows forward                                        |

In the `R` keybinding description, added "backward"
| ~R~           | rotate windows backward                                       |
tsonntag/dotemacs,tsonntag/dotemacs,tsonntag/dotemacs,tsonntag/dotemacs