[Docs]Fix typo in keyboardmanager.md (#20865)

atleast -> at least

doc/devdocs/modules/keyboardmanager/keyboardmanager.md

@@ -96,7 +96,7 @@ KBM uses two sets of settings files.
         }
 
     - `originalKeys` stores the key/shortcut which is to be pressed for the remap, and `newKeys` stores the key/shortcut which is to be executed.
-    - Both contain semi-colon separated virtual key codes. For `remapKeys`, `originalKeys` must have only one key code, whereas for `remapShortcuts` it must have atleast two key codes.
+    - Both contain semi-colon separated virtual key codes. For `remapKeys`, `originalKeys` must have only one key code, whereas for `remapShortcuts` it must have at least two key codes.
     - `inProcess` sub-key was added in `remapKeys` because there was a possibility of adding the registry based remapping approach (used by [SharpKeys](https://github.com/randyrants/sharpkeys)), so that would be under a separate sub-key while `inProcess` would be for keyboard hook based remaps. This was deprioritized as there weren't enough requests for it.
     - `remapShortcuts` is split into `global` and `appSpecific`, where `global` remaps would apply to all applications, whereas `appSpecific` would apply on when the `targetApp` is in focus. `targetApp` must be the process name of the app (with or without it's extension), e.g. `msedge` or `msedge.exe` for Microsoft Edge.