fix(docs): Fix wording in layers section in keymaps (#2474)

Author: jiimaho

docs/docs/keymaps/index.mdx

@@ -143,7 +143,7 @@ Each layer of your keymap will be nested under the keymap node. Here is an examp
 
 Each layer should have:
 
-1. A `bindings` property this will be a list of [behavior bindings](behaviors/index.mdx), one for each key position for the keyboard.
+1. A `bindings` property that will be a list of [behavior bindings](behaviors/index.mdx), one for each key position for the keyboard.
 1. (Optional) A `sensor-bindings` property that will be a list of behavior bindings for each sensor on the keyboard. (Currently, only encoders are supported as sensor hardware, but in the future devices like trackpoints would be supported the same way)
 1. (Optional) A `display-name` property that is a string used by certain features, such as the layer status display widget.