README: Mention the now dconf-configurable "sliderDevice"

Author: JamiKettunen

README.md

@@ -13,4 +13,10 @@ bottom='origami'
 There is also a [Sailfish OS settings plugin](https://github.com/sailfishos-oneplus5/onyx-triambience-settings-plugin) available for simple control of these values through the settings app.
 
 ## Adaptation
-The tristate key node and emitted event codes will most likely need to be changed [like I had to do for OnePlus 5/5T devices](https://github.com/sailfishos-oneplus5/triambience/commit/15772a57e8571799939bc1b7a80f7d04beb4771e).
+Now you can add a `/etc/dconf/db/vendor.d/triambienced.txt` file in your droid-config sparse files to choose the correct tristate key node when needed without having to fork this project, for example:
+```
+[apps/onyxtristate]
+sliderDevice='/dev/input/event6'
+```
+
+The [emitted tristate key event codes](https://github.com/sailfishos-oneplus5/triambience-daemon/commit/15772a57e8571799939bc1b7a80f7d04beb4771e#diff-855c3a38d4fc3858a48957f816ac34dfL115) still have to be changed in source for now; expect this to get easier soon ;)