docs: Fix wakeup-source property location for composite kscan (zmkfirmware#2861)

Author: caksoylar

docs/docs/config/kscan.md

@@ -216,19 +216,21 @@ Applies to : `compatible = "zmk,kscan-composite"`
 
 Definition file: [zmk/app/dts/bindings/zmk,kscan-composite.yaml](https://github.com/zmkfirmware/zmk/blob/main/app/dts/bindings/zmk,kscan-composite.yaml)
 
-| Property  | Type | Description                                   | Default |
-| --------- | ---- | --------------------------------------------- | ------- |
-| `rows`    | int  | The number of rows in the composite matrix    |         |
-| `columns` | int  | The number of columns in the composite matrix |         |
+| Property        | Type | Description                                           | Default |
+| --------------- | ---- | ----------------------------------------------------- | ------- |
+| `rows`          | int  | The number of rows in the composite matrix            |         |
+| `columns`       | int  | The number of columns in the composite matrix         |         |
+| `wakeup-source` | bool | Mark this kscan instance as able to wake the keyboard | n       |
 
 The `zmk,kscan-composite` node should have one child node per keyboard scan driver that should be composited. Each child node can have the following properties:
 
-| Property        | Type    | Description                                                                    | Default |
-| --------------- | ------- | ------------------------------------------------------------------------------ | ------- |
-| `kscan`         | phandle | Label of the kscan driver to include                                           |         |
-| `row-offset`    | int     | Shifts row 0 of the included driver to a new row in the composite matrix       | 0       |
-| `col-offset`    | int     | Shifts column 0 of the included driver to a new column in the composite matrix | 0       |
-| `wakeup-source` | bool    | Mark this kscan instance as able to wake the keyboard                          | n       |
+| Property     | Type    | Description                                                                    | Default |
+| ------------ | ------- | ------------------------------------------------------------------------------ | ------- |
+| `kscan`      | phandle | Label of the kscan driver to include                                           |         |
+| `row-offset` | int     | Shifts row 0 of the included driver to a new row in the composite matrix       | 0       |
+| `col-offset` | int     | Shifts column 0 of the included driver to a new column in the composite matrix | 0       |
+
+If you want one of the composited kscans to be able to wake up the keyboard, make sure to set the `wakeup-source` property in its own definition, in addition to setting it for the composite kscan node itself as listed above.
 
 ### Example Configuration