Update grocy/DOCS.md

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

grocy/DOCS.md

@@ -211,7 +211,7 @@ Allows posting to a webhook to print labels
 - `label_printer_webhook` The URI that Grocy will POST to when asked to print a label
 - `label_printer_run_server` Whether the webhook will be called server- or client-side
 - `label_printer_params` Additional parameters supplied to the webhook
-- `` TRUE to use JSON or FALSE to use normal POST request variables
+- `label_printer_hook_json`: TRUE to use JSON or FALSE to use normal POST request variables
 
 ### Option: `Thermal Printer`
 
@@ -224,7 +224,6 @@ the printer must support the ESC/POS protocol, see https://github.com/mike42/esc
 - `tprinter_ip` IP of the network printer (does only matter if it's a network printer)
 - `tprinter_port` Port of the network printer (does only matter if it's a network printer)
 - `tprinter_connector` Printer device (does only matter if you use a locally attached printer) For USB on Linux this is often '/dev/usb/lp0', for serial printers it could be similar to '/dev/ttyS0' Make sure that the user that runs the webserver has permissions to write to the printer - on Linux add your webserver user to the LP group with usermod -a -G lp www-data
-
 ## Known issues and limitations
 
 - Grocy support to provide custom lookup resources to lookup information