Update keycodes.md

Less disambiguation, and in line with the phrasing in the configurator.

docs/keycodes.md

@@ -341,7 +341,7 @@ See also: [Layer Switching](feature_layers.md#switching-and-toggling-layers)
 |`MO(layer)`     |Momentarily turn on `layer` when pressed (requires `KC_TRNS` on destination layer)|
 |`OSL(layer)`    |Momentarily activates `layer` until a key is pressed. See [One Shot Keys](one_shot_keys.md) for details. |
 |`LM(layer, mod)`|Momentarily turn on `layer` (like MO) with `mod` active as well.  Where `mod` is a mods_bit.  Mods can be viewed [here](mod_tap.md).  Example Implementation: `LM(LAYER_1, MOD_LALT)`|
-|`LT(layer, kc)` |Turn on `layer` when held, `kc` when tapped                                       |
+|`LT(layer, kc)` |Turn on `layer` while held, `kc` when tapped                                       |
 |`TG(layer)`     |Toggle `layer` on or off                                                          |
 |`TO(layer)`     |Turns on `layer` and turns off all other layers, except the default layer |
 |`TT(layer)`     |Normally acts like MO unless it's tapped multiple times, which toggles `layer` on |