fix(label): Socket sending

inventree_phomemo/phomemo_label.py

@@ -66,12 +66,14 @@ class PhomemoLabelPlugin(LabelPrintingMixin, SettingsMixin, InvenTreePlugin):
             'ppk': key
         }
 
+        data = json.dumps(fields)
+
         # Send the label to the printer
         try:
             print_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
             print_socket.settimeout(5)
             print_socket.connect((ip_address, port))
-            json.dump(fields, print_socket)
+            print_socket.sendall(bytes(data,encoding="utf-8"))
             print_socket.close()
         except Exception as error:
             raise ConnectionError('Error connecting to printer server: ' + str(error))