docs(spec): rename pressKey generator to pressKeys

docs/manual/spec-language.md

@@ -191,7 +191,7 @@ On web, `"back"` maps to Backspace and `"home"` is not supported. All other keys
 | `taps` | Random tap on a clickable element |
 | `swipes` | Random swipe gesture |
 | `waitOnce` | Idles one step |
-| `pressKey` | Presses a random supported key |
+| `pressKeys` | Presses a random supported key |
 
 ### `actions(generator)`
 

docs/manual/writing-specs.md

@@ -126,7 +126,7 @@ Action generators return a list of actions to perform. The runner samples one fr
 - `taps` - autonomous random taps on clickable elements.
 - `swipes` - autonomous random swipe gestures.
 - `waitOnce` - idles one step.
-- `pressKey` - presses a random supported key.
+- `pressKeys` - presses a random supported key.
 
 **Action constructors:**