add working path for watermark

Author: thelamer

ansible/roles/documentation/templates/README_SNIPPETS/SELKIES.j2

@@ -26,7 +26,7 @@ This container is based on [Docker Baseimage Selkies](https://github.com/linuxse
 | NO_DECOR | If set the application will run without window borders in openbox for use as a PWA. |
 | NO_FULL | Do not automatically fullscreen applications when using openbox. |
 | DISABLE_ZINK | Do not set zink related environment variables when a video card is detected. |
-| WATERMARK_PNG | Full path inside the container to a watermark png IE `/config/image.png` |
+| WATERMARK_PNG | Full path inside the container to a watermark png IE `/usr/share/selkies/www/icon.png` |
 | WATERMARK_LOCATION | Where to paint the image over the stream integer options below |
 
 * 1 - Top Left