fix(docs): Minor soft-off docs tweaks from review.

docs/docs/behaviors/soft-off.md

@@ -7,6 +7,8 @@ sidebar_label: Soft Off
 
 The soft off behavior is used to force the keyboard into an off state. Depending on the specific keyboard hardware, the keyboard can be turned back on again either with a dedicated on/off button that is available, or using the reset button found on the device.
 
+Refer to the [soft off config](../config/power.md#soft-off) for details on enabling soft off in order to use this behavior.
+
 For more information, see the [Soft Off Feature](../features/soft-off.md) page.
 
 ### Behavior Binding

docs/docs/features/soft-off.md

@@ -18,6 +18,10 @@ Once powered off, the keyboard will only wake up when:
 - You press the same button/sequence that you pressed to power off the keyboard, or
 - You press a reset button found on the keyboard.
 
+## Config
+
+Refer to the [soft off config](../config/power.md#soft-off) for details on enabling soft off.
+
 ## Soft Off With Existing Designs
 
 For existing designs, using soft off is as simple as placing the [Soft Off Behavior](../behaviors/soft-off.md) in your keymap and then invoking it.
@@ -104,7 +108,7 @@ With a simple direct pin setup, the The [direct kscan](../config/kscan.md) drive
 ```
     soft_off_direct_scan: soft_off_direct_scan {
         compatible = "zmk,kscan-gpio-direct";
-        input-keys = <&wakeup_key>;
+        input-keys = <&on_off_key>;
         wakeup-source;
     };
 ```
@@ -240,7 +244,7 @@ Next, we need to add another device which will be enabled only when the keyboard
     wakeup_source: wakeup_source {
         compatible = "zmk,gpio-key-wakeup-trigger";
 
-        trigger = <&wakeup_key>;
+        trigger = <&on_off_key>;
         wakeup-source;
     };
 };