Fix typo (#19035)

Swap Hands on/off - it's `SH_ON/OFF` not `SW_ON/OFF`

docs/keycodes.md

@@ -763,8 +763,8 @@ See also: [Swap Hands](feature_swap_hands.md)
 |Key        |Description                                                              |
 |-----------|-------------------------------------------------------------------------|
 |`SH_T(key)`|Sends `key` with a tap; momentary swap when held.                        |
-|`SW_ON`    |Turns on swapping and leaves it on.                                      |
-|`SW_OFF`   |Turn off swapping and leaves it off. Good for returning to a known state.|
+|`SH_ON`    |Turns on swapping and leaves it on.                                      |
+|`SH_OFF`   |Turn off swapping and leaves it off. Good for returning to a known state.|
 |`SH_MON`   |Swaps hands when pressed, returns to normal when released (momentary).   |
 |`SH_MOFF`  |Momentarily turns off swap.                                              |
 |`SH_TG`    |Toggles swap on and off with every key press.                            |